Fourth Season

4x01+4x02 The Way Of The Warrior (2 part episode)

Writers: Ira Steven Behr and Robert Hewitt Wolfe
Direcor: James L. Conway
Cast: Penny Johnson (Kasidy Yates), Marc Alaimo (Gul Dukat), Robert O'Reilly (Gowron), J.G. Hertzler (Martok), Obi Ndefo (Drex), Christopher Darga (Kaybok), William Dennis Hunt (Huraga), Andrew Robinson (Garak)
New permanent cast member: Michael Dorn (Lieutenant Commander Worf)

Since the destruction of the Obsidian Order, Cardassia is in trouble and has closed her borders. A fleet of Klingon ships arrives at DS9. Their commander, general Martok, tels Sisko that his fleet was sent by Gowron to help the Federation in her struggle with the Dominion. The Klingons cause trouble on the station and beat up the cardassian taylor Garak.

Later DS9 receives a distress call from captain Cassidy, whose freighter just left DS9, that she is being boarded by Klingons who claim to have an order from Gowron to search all ships for changelings, the founders of the Dominion. Sisko takes the Defiant and draws off the Klingons.

Meanwhile, lt.cmdr. Worf has arrived and Sisko briefs him. His tast will be to be a liaison between the Klingons and Starfleet, and to find out why the Klingon troops are on DS9. He discovers that the Klingons found out that the Cardassian Central Command has been overthrown and they suspect the Dominion behind this. Because Klingon and Cardassian space are close they have decided to invade Cardassia and whipe out the new government. Sisko informs them the Federation will not support this action. The Klingon warships cloack and leave DS9.

The Federation has openly disapproved the attack and Gowron has withdrawn the Klingon Empire from the Kithomer agreements. Worf is given the choice: support Gowron or remain in Starfleet. If the clooses the later, Gowron will dishonor Worfs family. He chooses not to support Gowron. Later Sisko contacts Gul Dukat, who is working for the civil government now, who tells them the situation is critical.

Worf wants te leave Starfleet, but Sisko refuses to accept this. He contacts Gul Dukat and offers the civil government asylum on DS9. Together with Worf he leaves with the Defiant to meet with a Cardassian ship carrying the government. When the arrive the ship is under Klingon attack. In the following battle they succeed in beaming the government on board and head back to DS9 with the Klingons in persuit. DS9 is preparing for battle. If Martok contacts DS9 and demands the civil government being transfered to him Sisko tells him that genetic screening proved that none of the members of the government were changelings, but nevertheless, the Klingons attack. Fortunately the station has had a massive upgrade on her defensive systems due to the Dominion threat so they can defend themselves. But when the Klingons partially destroy their shields the station is being boarded and man to man combats start. Just on time, Federation help arrives and the Klingons withdraw, not wanting a victory which would leave the Klingon Empire weak. Gowron however, states they will not forget this.

The Cardassian civil government returns to Cardassia Prime but the Klingons won't withdraw from some Cardassian colonies. Worf wants to leave Starfleet and join the Nyberrite alliance but Sisko convinces him to stay.

4x03 Hippocratic Oath

Teleplay: Lisa Klink
Story: Nick Corea and Lisa Klink
Director: Rene Auberjonois
Cast: Scott MacDonald (Goran'Agar) Stephen Davies (Arak'Taral) Jerry Roberts (Meso'Clan) Marshall Teague (Temo'Zuma)

Held prisoner by a group of rebel Jem'Hadar, Bashir and O'Brien clash over Bashir's desire to help their captors escape Dominion rule. The Jem'Hadar are being kept deoendant from the Dominion with a drug only the founders can provide. Bashir must choose between helping his Jem'Hadar captors or leaving them to die as O'Brien wants to. Meanwhile, on DS9 Worfs screws up an investigation by Odo.

4x04 The Visitor

Writer: Michael Taylor
Directed by: David Livingston
Cast: Tony Todd (Adult Jake) Galyn Gorg (Korena) Aron Eisenberg (Nog) Rachel Robinson (Melanie)

When a tragic accident causes Sisko to vanish before his son's eyes, young Jake begins a life-long obsession to bring him back.

4x05 Indescretion

Teleplay: Nicholas Corea
Story: Toni Marberry and Jack Trevino
Director: LeVar Burton
Cast: Penny Johnson (Kasidy Yates), Marc Alaimo (Gul Dukat), Roy Brocksmith (Razka)

Kira wents on a personal mission to rescue Bajoran prisoners who are apparently being held captive on a Cardassian ship. She is forced to bring Gul Dukat with her. Kira discovers the real reason he wants to accompany her. He must find his daughter - to kill her.

4x06 Rejoined

Teleplay: Ronald D. Moore and Rene Echevarria
Story: Rene Echevarria
Director: Avery Brooks
Cast: Susanna Thompson (Dr. Lenara [Kahn]) Tim Ryan (Bejal [Kahn]) James Noah (Dr. Pren) Kenneth Marshall (Eddington)

Jadzia Dax must choose between her feelings and the rules of Trill society when she is reunited with the wife of one of Dax's previous hosts. Trill law forbids them to start a new relationship. Will Dax risk everything to be with her one true love?

4x07 Starship Down

Writter: David Mack and John J. Ordover
Director: Alexander Singer
Cast: James Cromwell (Hanok), F.J. Rio (Muniz), Jay Baker (Stevens), Sara Mornell (Carson)

While the Defiant tries to rescue a ship from the corona of a red giant star, she is attacked by the Jem'Hadar. This leaves the Defiant trapped in a planet's volatile atmosphere.

4x08 Little Green Men

Teleplay: Ira Steven Behr and Robert Hewitt Wolfe
Story: Toni Marberry and Jack Trevino
Director: James L. Conway
Cast: Megan Gallagher (Nurse Garland), Charles Napier (Denning), Max Grodenchik (Rom), Aron Eisenberg (Nog), Conor O'Farrell (Carlson), James G. MacDonald (Wainwright)

A Mishap sends Quark, Rom, and Nog back in time to Earth of 1947 in Roswell, New Mexico, where military forces mistake them for alien invaders.

4x09 The Sword Of Kahless

Teleplay: Hans Beimler
Story: Richard Danus
Director: LeVar Burton
Cast: John Colicos (Kor), Rick Pasqualone (Toral)

Kor, a revered Klingon warrior, sets out with Worf and Dax in search of a mythical, ancient artifact they believe has the power to unite the Klingon Empire: the sword of Kahless, which he believes is somewhere in the gamma quadrant. If they leave in a runabout, they are being attacked by Toral, son of Duras, who is also searching for the sword. Its conquests are legendary, but its power could tear apart Worf and Dax.

4x10 Our Man Bashir

Teleplay: Ronald D. Moore
Story: Robert Gillan
Director: Winrich Kolbe
Cast: Max Grodenchik (Rom), Kenneth Marshal (Eddington), Andrew Robinson (Garak)

Posing as a 1960s secret agent in a malfunctioning holosuite program, Bashir is all that stands between his trapped fellow officers and certain death.

4x11 Homefront

Writers: Ira Steven Behr and Robert Hewitt Wolfe
Director: David Livingston
Cast: Robert Foxworth (Leyton), Herschel Sparber (Jaresh-Inyo), Susan Gibney (Benteen), Aron Eisenberg (Nog), Brock Peters (Joseph Sisko)

When on earth a conference between the federation and the Romulans is disrupted by an attack it becomes clear that Changelings are targeting Earth. Sisko and Odo are being transfered to Earth where Sisko is put in charge of Starfleet Security. Once on Earth he visits together with Jake his father in a restaurant and they met Nog who has a hard time on Starfleet academy.

The seriousness of the situation becomes soon clear when they find out that some of the highest Starfleet officers are replaced by changelings. Sisko decides to declare martial law and prepares for war with the Dominion.

4x12 Paradise Lost

Teleplay: Ira Steven Behr and Robert Hewitt Wolfe
Story: Ronald D. Moore
Director: Reza Badiyi
Cast: Robert Foxworth (Leyton), Herschel Sparber (Jaresh-Inyo), Susan Gibney (Benteen), Aron Eisenberg (Nog), David Drew Gallagher (Riley Shepard), Mina Badie (Security Officer), Rudolph Willrich (Academy Commandant), Brock Peters (Joseph Sisko)

The power on the whole planet is dropped and the Dominion is the main suspect. While Starfleet Security prepares for the confrontation it becomes clear that some troops cannot bve used, and Sisko thinks Starfleet Command is behind this. Sisko reports to the president of the Federation. He is unwilling to believe this untill Odo suddenly appears from an object he changes his mind. Sisko calls in the Defiant, but the USS Lakota gets the order to stop the defiant. Now Sisko has to convince the crew of the Lakota that their orders are given by a changeling, and solve the conspiracy.

4x13 Crossfire

Writer: Rene Echevarria
Director: Les Landau
Cast: Duncan Regehr (Shakaar), Bruce Wright (Sarish)

Odo's hidden feelings for Kira interfere with his duty to protect the Bajoran First Minister, who also happens to be attracted to her. Will he reveal his feelings for Kira before she falls for someone else?

4x14 Return To Grace

Teleplay: Hans Beimler
Story: Tom Benko
Director: Jonathan West Cast: Marc Alaimo (Dukat), Cyia Batten ([Tora] Ziyal), Casey Biggs (Damar)

A demoted Dukat enlists Kira's aid in regaining his former status in the Cardassian Empire. Kira and Dukat join forces to take on a ship of murderous Klingons.

4x15 The Sons Of Mogh

Writer: Ronald D. Moore
Director: David Livingston
Cast: Tony Todd (Kurn), Robert Doqui (Noggra)

Cast out of Klingon society because of Worf's dishonor, his outcast brother asks Worf to kill him.

4x16 The Bar Association

Teleplay: Robert Hewitt Wolfe and Ira Steven Behr
Story: Barbara J. Lee and Jennifer A. Lee
Director: LeVar Burton
Cast: Max Grodenchik (Rom), Chase Masterson (Leeta), Jason Marsden (Grimp), Emilio Borelli (Frool)

Tired of workplace mistreatment at the hands of his brother, Rom organizes all of Quark's employees into a union and goes on strike against the bar.

4x17 Accession

Writer: Jane Espenson
Director: Les Landau
Cast: Richard Libertini (Akorem Laan)

A legendary Bajoran appears mysteriously after more than 200 years and challenges Sisko's claim to be the Emissary.

4x18 Rules Of Engagement

Story: Bradly Thompson and David Weddle
Teleplay: Ronald D. Moore
Director: LeVar Burton
Cast: Ron Canada (Ch'Pok), Deborah Strang (T'Lara)

The Klingon Empire accuses Worf of wantonly destroying a Klingon ship during a battle.

4x19 Hard Time

Teleplay: Robert Hewitt Wolfe
Story: Daniel Keys Moran and Lynn Barker
Director: Alexander Singer
Cast: Rosalind Chao (Keiko), Margot Rose (Rinn), Hana Hatae (Molly), F.J. Rio (Muniz), Craig Wasson (Ee'char)

After an alien race implants false memories of a twenty-year prison sentence into O'Brien's brain, he has trouble readjusting to station life.

4x20 Shattered Mirror

Writers: Ira Steven Behr and Hans Beimler
Director: James L. Conway
Cast: Andrew Robinson (Garak) Felecia M. Bell (Jennifer Sisko), Aron Eisenberg (Nog), Carlos Carrasco (Klingon Officer)

Sisko follows his son into a war-torn alternate universe, where an evil Worf rules, after Jake is lured there by the living counterpart of his late mother.

4x21 Muse

Teleplay: Rene Echevarria
Story: Rene Echevarria and Majel Barrett Roddenberry
Director: David Livingston
Cast: Majel Barrett (Lwaxana Troi), Michael Ansara (Jeyal), Meg Foster (Onaya)

While Odo provides shelter for a pregnant Lwaxana Troi, Jake Sisko falls under the spell of a mysterious woman.

4x22 For The Cause

Teleplay: Ronald D. Moore
Story: Mark Gehred-O'Connell
Director: James L. Conway
Cast: Penny Johnson (Kasidy Yates), Kenneth Marshall (Lt.~Eddington), Tracy Middendorf (Ziyal), John Prosky (Brathaw), Steven Voncent Leigh (Lt.~Reese) Andrew Robinson (Garak)

Sisko is shocked to learn that his girlfriend, Kasidy Yates, may be a Maquis smuggler.

4x23 To The Death

Writers: Ira Steven Behr and Robert Hewitt Wolfe
Director: LeVar Burton
Cast: Brian Thompson (Toman'torax), Scott Haven (Virak'kara), Clarence Williams III (Omet'iklan)

Attempting to stop a group of Jem'Hadar renegades from gaining power, Sisko and the Defiant crew must join forces with deadly Jem'Hadar soldiers.

4x24 The Quickening

Writer: Naren Shankar
Director: Rene Auberjonois
Cast: Ellen Wheeler (Ekoria), Dylan Haggerty (Epran), Michael Sarrazin (Trevean)

Bashir tries to save a Gamma Quadrant society afflicted with an incurable, terminal disease by the Jem'Hadar.

4x25 Body Parts

Teleplay: Hans Beimler
Story: Louis P. DeSantis and Robert J. Bolivar
Director: Avery Brooks
Cast: Rosalind Chao (Keiko), Max Grodenchik (Rom), Hana Hatae (Molly), Andrew Robinson (Garak)

Rom returns when Quark thinks he's dying. Misdiagnosed with a terminal disease, Quark sells his body parts on the Ferengi market to pay off his debts, then finds himself unable to break the contract.

4x26 Broken Link

Teleplay: Ira Steven Behr and Robert Hewitt Wolfe
Story: George A. Brozak
Direcor: Les Landau
Cast: Salome Jens (Female Shapeshifter), Robert O'Reilly (Gowron), Jill Jacobson (Aroya), Leslie Bevis (Freighter Captain), Andrew Robinson (Garak)

Odo is forced to return to the homeworld of his people and face judgment for killing one of his own.