Recuperating from her alternate reality meeting with William Bell (LEONARD NIMOY), Olivia consumes a powerful "fringe" concoction that Walter prescribes to stimulate her memory.

In the season finale, the Fringe Division is attacked, Mr. Jones returns, Walter disappears and Massive Dynamics' elusive William Bell (LEONARD NIMOY) is finally introduced.

Dr. Walter Bishop's braininess takes on a new meaning when the Fringe team investigate impromptu brain surgeries — and William Bell (LEONARD NIMOY) resurfaces.

The universes may never be the same on the Season 2 Finale!

Walter and Olivia venture into the alternate world for the anticipated face-off with William Bell (special guest star LEONARD NIMOY) in the first of a two-part season finale.

Picard and Data travel to Romulus to investigate an unauthorized mission undertaken by a legendary Federation representative.

Spock proceeds with his quest for the reunification of Vulcan and Romulus even though he and Picard are suspicious of Romulan motives.

In the Season Four finale, the Fringe team is pushed to their breaking point as they desperately attempt to prevent a catastrophic event threatening the lives of everyone.

A case of spontaneous combustion forces Walter to revisit his painful past, while the Fringe team faces off against David Robert Jones to save the world — or worlds.

A surgeon kills a nurse who suspects him of intentionally botching the heart surgery of his colleague, a cardiac expert.

Adam and Little Joe warn Hoss when he tries to help Arnie, a man with the mind of a child and an uncontrollable temper.

Jonathan Winters plays two roles in "The Wonderful World Of Prisons!" "Carol & Sis" put together a surprise party; "Mrs. Invisible Man."

An emergency at a nuclear power plant sets the wheels of man's possible destruction into horrifying motion as a scientist races to find a solution!

During a battle, a fanatical and racist World War II soldier mysteriously experiences the situation in the body of a Japanese counterpart.

Adam, a powerful robot, kills his creator when the scientist attempts to convert him into a military killing machine by destroying his more human qualities.

Hooker confronts an old buddy, Lt. Paul McGuire, seeking revenge against a rapist.

Three brothers plan to free a fourth from Alcatraz.

Max and 99 search for a KAOS computer that's intercepting all CONTROL's messages.

Mike tries to prove that a woman's drowning was not accidental.

Solo and Illya use a complex deception to trap an evil diplomat (Werner Klemperer); guests William Shatner, Leonard Nimoy.