Edith's Final Respects - S9-E5
Continuity mistake: In this episode Jean Stapleton plays two characters. As Edith Bunker her earrings change from gold that curve below her lobes to white round ones later in the show.
Six Strangers at Apache Springs - S2-E7
Continuity mistake: Heyes' horse is shot out from under him by the Chiracahua, forcing him to leave it behind and ride double with Curry. But when they return to Apache Springs, Heyes is again riding the same horse that was shot earlier. (00:40:40 - 00:43:30)
The Man They Called a Magician - S1-E2
Continuity mistake: When Pycal checks out Fujiko's recorded message, the distance between the tape player and the edge of the table changes between shots. (00:16:20)