Other mistake: How on earth can a jobbing actor in a late-night soap with a non-paying tenant afford a huge, luxurious, two-bedroom apartment, complete with balcony and communal hot-tub, all within a few miles of the Hollywood sign? That's the expensive side of L.A, and he'd be very lucky to get that apartment for under five figures a month.
Continuity mistake: In the episode where they overhaul a 1976 blue van, there is a shot of the white donor van being carted away. Yet later on in the same episode, the white donor van is back in the workshop.
Factual error: Jimmy Langley wears the single pip of a second lieutenant. He was actually a lieutenant at the time and should therefore be wearing two pips.
Factual error: Both Inspector Shaw and Chief Inspector Bailie wear their medal ribbons in the wrong order. The Golden Jubilee Medal is worn first, followed by the Diamond Jubilee Medal, followed by (for Bailie) the Long Service and Good Conduct Medal.