Red Dwarf (1988)

M-Corp - S12-E5

Other mistake: When Cat picks up the can of Leopard lager which is invisible to Lister, he shakes it, pops the cap and sprays Lister with foam. The foam is visible but the can remains invisible, and that makes no sense. If we are seeing the scene from Cat's point of view the can and foam should both be visible, and if it is from Lister's then neither should be.

Nanarchy - S7-E8

Lister: What, they fixed your core program and then decided they'd be better off without you?
Holly: Yeah, it was shortly after they met me.

Trivia: The actor who plays the original Kryten, in 'Kryten', also turns up later as the voice of Talkie Toaster.