“Fear is the most honest of all emotions”: Catspaw (Original Series) vs. The Thaw (Voyager)

Star Trek explores the nature of fear, as Captain Kirk visits Planet Spirit Halloween, and Ensign Kim is tormented by a murder-clown.

“I don’t know how I’m going to enter this into the log”: Where No One Has Gone Before (TNG) vs. Threshold (Voyager)

The crew of the Enterprise go where they should never have gone in the first place … and so do the writers of Voyager.

“You have angered The Picard”: Who Watches the Watchers (TNG) vs. New Eden (Discovery)

Picard gets a promotion from captain to god, and the Discovery visits a distant colony of humans whose ancestors were abducted by “angels”.

“I’m literally angry with rage!”: The Squire of Gothos (TOS) vs. Where No Fan Has Gone Before (Futurama)

The crew of the Enterprise meet Earth’s biggest fan, and the cast of the show meet Star Trek’s biggest fan.

“Above all else, a god needs compassion”: The Cage (TOS) vs. Where No Man Has Gone Before (TOS)

The series so nice they made a pilot, twice

“If we’re going to be damned, let’s be damned for what we really are”: Encounter at Farpoint (TNG) vs. Emissary (DS9)

In the first episode of TNG, Picard wants to see what’s out there, and in the first episode of DS9, Sisko’s not afraid to get his hands dirty.

“Is there a John Luck Pickurd here?”: Yesteryear (TAS) vs. Tapestry (TNG)

Young Spock learns that the needs of an injured pet outweigh the needs of its owner, and young Picard learns that getting stabbed through the heart can be good, actually.