A hit-and-miss, if still probably good, 1974 film.
'Thunderbolt and Lightfoot' fails as a comedy but actually does work as a road trip/heist movie, even with a surprisingly sombre ending. To further the mixed bag feeling, I found the acting talent to be just that.
I'd say this is one of Clint Eastwood's weakest performances, though Jeff Bridges has a lot of fun and is the standout in his role. George Kennedy is closely behind him and ahead of Eastwood, in my opinion.
The film attempts a lot, I'm not convinced it all works, but I'd recommend it - the pacing is on point, so it doesn't drag.