There's a Canadian comedy from 1997 called 'The Wrong Guy'.I saw it about 10 or 11 years ago on BBC2.The film has never been released over here in dvd.It's only available on region 1.
2 other films that spring to mind that i haven't seen on tv for sometime is the Dana Carvey comedy 'Clean Slate' & the Nicolas Cage film 'Trapped in Paradise'.However both are available on dvd.
I remeber watching Twenty One with Kevin Spacey, on a flight a few years back. I've never seen it on TV - even on sky?
21 was shown last year on channel 5