Erm. Well, I love Crime Traveller, but despite its bad reputation in some quarters I don't feel remotely ashamed of that, 'cos I think it's really jolly good.
Let me think...
Okay, many years ago there was an actress I quite liked called Caroline Waldron, and she was in a sitcom called What you lookin' at? And it was...not much cop. That's being charitable. It was produced by Humphrey Barclay, who on the basis of his CV probably ought to have known better (apart from anything else he was, at the time, also producing the rather more acclaimed Desmond's).
I mean, I've not got much to be ashamed of - I probably watched it precisely once, at the time it first went out, although I've almost certainly still got it on tape (in the attic). But yeah, I think of all the things I've ever watched, that's the one that on balance I feel most terminally embarrassed about.