“Up north, quite a ways”: Spectre of the Gun (Original Series) vs. North Star (Enterprise)

Kirk and Archer take their respective Enterprises into the Wild, Wild West … but, you know, in space.

“Eyes in the dark”: Night Terrors (TNG) vs. The Haunting of Deck Twelve (Voyager)

Who says they won’t celebrate Halloween in the 24th century? Neelix tells the Borg kids a ghost story, while the crew of the Enterprise hallucinate some scary stories of their own.

“I’ll try to make my lies more opaque”: The Defector (TNG) vs. Duet (DS9)

A Romulan defector and a mysterious Cardassian show us what true patriotism might look like, in two fine examples of Star Trek at its Star Trek-iest.

“You’re on the other side now”: The Ensigns of Command (TNG) vs. Progress (DS9)

Data learns that honesty isn’t the best policy — until it is — and Kira learns that she doesn’t get to be the good guy anymore.

“Do we need a mutiny today to prove who we are?”: Equinox, Parts 1 & 2 (Voyager) vs. The War Without, The War Within & Will You Take My Hand? (Discovery)

The crew of Voyager meet another Starfleet crew who aren’t nearly as cool about being stranded in the Delta Quadrant as they are; the crew of the Discovery learn that Starfleet Command has made a genocidal Terran their new captain.

“Did humans really talk like that?”: A Piece of the Action (TOS) vs. The Royale (TNG)

Away teams from two Enterprises encounter echoes of Earth’s past on far-off planets … and also cheat at craps (and fizzbin).

“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.

“The dream dreams the dreamer”: Birthright, Part 1 (TNG) vs. Tinker Tenor Doctor Spy (VOY)

Data learns to dream, and the Doctor learns to daydream.

“A little ship that took a little trip”: The Terratin Incident (TAS) vs. One Little Ship (DS9)

Honey, I Shrunk the Crew of the Enterprise (and a Runabout)