Show All Star Trek: Enterprise Star Trek Star Trek: The Next Generation Star Trek: Deep Space Nine Star Trek: Voyager Star Trek: Animated Adventures 1 - 20 of 34 sorted by 'Aliens'. Aliens Episode Amoeba TOS 048 - The Immunity Syndrome Andorians TOS 044 - Journey to Babel Argelians DS9 467 - The Die Is Cast Capellans TOS 032 - Friday's Child Companion, the TOS 031 - Metamorphosis Deltans MOV 001 - Star Trek: The Motion Picture Ekosians TOS 052 - Patterns of Force Elasians TOS 057 - Elaan of Troyius Excalbians TOS 077 - The Savage Curtain Fabrini TOS 065 - For the World Is Hollow and I Have Touched the Sky Gorn TOS 019 - Arena Halkans TOS 039 - Mirror, Mirror Horta TOS 026 - The Devil in the Dark Iotians TOS 049 - A Piece of the Action Kelvans TOS 050 - By Any Other Name Klingons TOS 027 - Errand of Mercy M-113 Creature TOS 006 - The Man Trap Medusans TOS 062 - Is There In Truth No Beauty? Melkotians TOS 056 - Spectre of the Gun Metron TOS 019 - Arena