Dungeons & Dragons (1983)

The easiest binge on the list: just 27 episodes aired between September 1983 and December 1985, so a long weekend covers all of it. Six friends stuck in a fantasy realm, a cryptic Dungeon Master and the villain Venger give it a darker, more serialized feel than most Saturday-morning fare. It never got a proper ending on TV. Writer Michael Reaves wrote a finale script, Requiem, that was never produced, though it later turned up as a radio play on a DVD release, which makes a fitting last stop.