Capt. Elizabeth Lochley (Tracy Scoggins) arrives to take command of the space station, where Sheridan refuses to cancel his inauguration despite threats to his life. Lt. Corwin: Joshua Cox. John: Anthony Crivello. Byron: Robin Atkin Downes.
Londo (Peter Jurasik) suffers a heart attack and must face his greatest fear in order to recover; Lennier (Bill Mumy) requests a transfer home to Minbar. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan. G'Kar: Andreas Katsulas. Franklin: Richard Biggs.
The Alliance faces its first test when the Drazi and several other races refuse to sign the Declaration of Principles; Garibaldi tries to hire telepaths for his covert operations force. Garibaldi: Jerry Doyle. Verchan: Tony Abatemarco. Byron: Robin Atkin Downes.
As a hostile alien force prepares to attack the station, two winsome maintenance guys go about their duties. Mack: Raymond O'Conner. Bo: Lawrence LeJohn. Byron: Robin Atkin Downes. Lt. Corwin: Joshua Cox. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan.
Gambling racketeers terrorize Down Below; Garibaldi confronts Lochley (Tracy Scoggins) about her loyalties during the civil war. Trace: Trevor Goddard. Turval: Turhan Bay. Tannier: Brendan Ford. Rastenn: Nathan Anderson. Durhan: Brian McDermott.
Bester (Walter Koenig) lands on Babylon 5 with intentions of taking the refugee telepaths into custody; an assassination attempt is made on Londo (Peter Jurasik). Garibaldi: Jerry Doyle. Lochley: Tracy Scoggins. Byron: Robin Atkin Downes.
Franklin (Richard Biggs) uncovers a centuries-old mystery while pulling together data on inter-species diseases; and a meeting of the minds between Byron and Lyta also yields a puzzle. Lyta: Patricia Tallman. Byron: Robin Atkin Downes.
The Brakiri negotiate to purchase a section of Babylon 5 for a religious ceremony; and all await the arrival of the comedy team of Rebo and Zooty. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan.
Byron (Robin Atkin Downes) and his refugee telepaths present an ultimatum to the Instellar Alliance; Sheridan receives information about mysterious attacks in space; Londo and G'Kar journey to Centauri Prime. G'Kar: Andreas Katsulas. Londo: Peter Juarsik.
Londo and G'Kar (Peter Jurasik, Andreas Katsulas) make a discovery on Centauri Prime. Meanwhile, members of the Alliance accuse each other of conducting attacks on their ships; and strife with the telepaths continues to mount. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan.
Bester (Walter Koenig) returns to Babylon 5 to handle the crisis with the telepaths---and to face an irate Garibaldi. Delenn: Mira Furlan. Sheridan: Bruce Boxleitner.
Garibaldi (Jerry Doyle) takes off for the Drazi homeworld after receiving a lead on the identity of the raiders, who continue to prey on Alliance members. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan.
The inner workings of the Psi Corps are observed as Bester (Walter Koenig) hunts a dangerous telepath whose trail leads to Babylon 5. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan.
Delenn calls on Lennier (Bill Mumy) for a secret mission to find out who is really behind the strikes by the raiders. Sheridan: Bruce Boxleitner.
Lennier bravely risks his life and succeeds in obtaining the evidence the Alliance needs about the raiders; Lyta (Patricia Tallman) searches for alternatives concerning the telepaths. Lennier: Bill Mumy. Delenn: Mira Furlan. Sheridan: Bruce Boxleitner.
Garibaldi is central to Sheridan's plan to avert war; Londo takes a great risk by returning to Centauri Prime---with G'Kar. Sheridan: Bruce Boxleitner. Londo: Peter Jurasik. G'Kar: Andreas Katsulas.
Sheridan (Bruce Boxleitner) tries to unite Alliance forces to discover the strategy behind the Centauri attacks, but the Drazi have their own remedy for the escalating war; Franklin (Richard Biggs) and Lyta make a shocking discovery on the Drazi homeworld. Londo: Peter Jurasik.
Londo (Peter Jurasik) must make a tremendous sacrifice to bring an end to the war between the Centauris and the Alliance. Meanwhile, Lennier (Bill Mumy) makes a difficult admission to Delenn (Mira Furlan). Sheridan: Bruce Boxleitner.
G'Kar (Andreas Katsulas) receives a hero's welcome when he returns to the station; Lyta is charged with aiding telepathic terrorists; Lochley (Tracy Scoggins) confronts Garibaldi (Jerry Doyle) about his drinking problem. Sheridan: Bruce Boxleitner. Delenn: Mira Furlan.
As Garibaldi (Jerry Doyle) and Lise prepare for marriage, a visitor arrives from Mars with grim news; and Sheridan bids farewell as several friends depart the station. No. 1: Marjorie Monaghan. Franklin: Richard Biggs. Casey: James Hornbeck.
Sheridan and Delenn leave the station for a new life on Minbar, but their hopes for a happy departure are sidetracked by Lennier (Bill Mumy); G'Kar's successor arrives at Babylon 5. Londo: Peter Jurasik. Ta'Lon: Marshall Teague. Franklin: Richard Biggs.
Sheridan (Bruce Boxleitner) gathers old friends on Minbar, then returns to the site of his last brush with death; Zack oversees the decommissioning of the space station. Delenn: Mira Furlan. Ivanova: Claudia Christian. Franklin: Richard Biggs. Garibaldi: Jerry Doyle.