Columbo
Never again
Granted towards the end of its run on Ch10, yeah BBAU did get kinda gimmicky with some of the intrusive commercial tie-ins on the show but IMO it was no where near as bad as Ch 9. Season 1 to 5 on Ch 10 were pretty good in that regard, there was very little interference from the producers and left the hms pretty much to their own devices for the majority of the time.
Looking back on it the gimmicks/twists introduced to spruce up the show from Season 6 to 8 were in 'good' taste and showed considerable amount of restraint (not as blatant and frequent) in comparison to the shameless constant bombardment of promotions and twists the f^ckwits from Ch 9 thought were necessary to hold the viewers attention.
Chubby Checker himself would have been proud of the number of "twists" that Ch 9 had.