Lists of Star Trek episodes

The fictional Star Trek franchise is composed mostly of hundreds of hours of television programming:

Television episodes

• List of Star Trek: The Original Series episodes
• List of Star Trek: The Animated Series episodes
• List of Star Trek: The Next Generation episodes
• List of Star Trek: Deep Space Nine episodes
• List of Star Trek: Voyager episodes
• List of Star Trek: Enterprise episodes

List of feature-length and multi-part episodes

Star Trek: The Original Series

• The Menagerie Parts I and II

Star Trek: The Next Generation

• Encounter at Farpoint
• The Best of Both Worlds Parts I and II
• Redemption Parts I and II
• Unification Parts I and II
• Time's Arrow Parts I and II
• Chain of Command Parts I and II
• Birthright Parts I and II
• I, Borg / Descent Parts I and II
• Gambit Parts I and II
• All Good Things...

Star Trek: Deep Space Nine

• Emissary
• The Homecoming/The Circle/The Siege
• The Maquis Parts I and II
• The Search Parts I and II
• Past Tense Parts I and II
• Improbable Cause / The Die is Cast
• The Way of the Warrior
• Homefront / Paradise Lost
• In Purgatory's Shadow / By Inferno's Light
• Favor the Bold / Sacrifice of Angles
• Tears of the Prophets / Image in the Sand / Shadows and Symbols
• What You Leave Behind

Note that the series' serialized structure means that many plot threads and conflicts span multiple episodes, in particular the first six episodes of the sixth season and the series' last nine episodes (referred to collectively as the "Final Chapter").

Star Trek: Voyager

• Caretaker
• The Basics Parts I and II
• Future's End Parts I and II
• Scorpion Parts I and II
• The Year of Hell Parts I and II
• The Killing Game Parts I and II
• Dark Frontier
• Equinox Parts I and II
• Unimatrix Zero Parts I and II
• Flesh and Blood Parts I and II
• Workforce Parts I and II
• Endgame

Star Trek: Enterprise

• Broken Bow
• Shockwave Parts I and II
• Storm Front Parts I and II
• Borderland / Cold Station 12 / The Augments
• The Forge / Awakening / Kir'Shara
• Babel One / United / The Aenar
• Affliction / Divergence
• In a Mirror, Darkly Parts I and II
• Demons / Terra Prime

Note that the series adopted a serialized, arc form during its third and fourth seasons, with all episodes of season 3 (along with one season 2 episode and three season 4 episodes) being considered one long arc called the Xindi Arc. The series' fourth season also consisted primarily of two- and three-episode story arcs, most of which are listed above.