Visible crew/equipment: When everyone's back at the flat, as Del Boy is looking straight down the hallway to his and Rodney's bedroom, someone comes up to him and he turns around. When it goes from his close-up to the wide shot of everyone else the shadow of the camera reversing backwards is visible for a few seconds.
Visible crew/equipment: When Zaphod says his first line "I certainly didn't survive.", you can see the person who plays his third arm standing behind him.
There's Just No Accounting... - S2-E18
Visible crew/equipment: At the end, when Carlisle claims he and Bill had a business lunch in June to discuss a case, Pam explains that La Maison Faire is very expensive French cuisine in Beverly Hills, and in the next shot an actor's T-mark is visible on the floor. (00:47:15)