Okay, this just occured to me, but Star Trek: Voyager's "The Killing Game" so strongly alludes to / takes a page from Casablanca? And it's just straight up not mentioned anywhere; not on the behind the scenes or trivia sections on either Wikipedia or Memory Alpha?
I mean:
- Rick is a nightclub owner in nazi-aligned French territory who claims to be neutral but has a past as a resistance fighter and eventually foils the nazis' plans
and
Janeway (as "Katrine") is a nightclub owner in nazi-occupied France who claims to be neutral ("everyone is welcome as long as you leave the war outside") but is secretly the leader of a reistance cell fighting the nazis - Rick (an American) used to have a fling with Ilsa, which was interrupted by the war. They meet again later and she's with another man.
and
Tom Paris (as "Lt. Bobby Davis") used to have a fling with B'Elanna (as "Brigitte") and a reunion was prevented by the war. They meet again later and she's pregnant from another man. Also, both Ilsa and Brigitte have German-sounding names. - Rick wears a (iconic!) white dinner jacket; Katrine wears a travesty best described as a womenswear designer's fever dream of a dinner suit.
- A little more abstract, in Casablanca, there is a scene where nazis and anti-nazi French people sing competing nationalist songs; in "The Killing Game", the nazi leader wants to hear a song at the nightclub and Seven (as "Mademoiselle de Neuf") refuses to perform it.
- And on a metal level: Rick's escape at the end is only possible because an officer from the nazi-aligned French forces joins him; likewise "The Killing Game" is ultimately resolved because one faction of the occupying aliens (who cosplay the nazis in the simulation) collaborates with Janeway.
I mean, come on! It's a very clear hommage to Casablanca! I'm not seeing things, right?