There were lots of cool cars on Mannix, the show is on ME TV at 2am on the east coast. There were some 69 and 70 Chargers on There as well as a great chase scene where a guy in an orange 71 Road Runner is chasing Mannix in his 71 Cuda convertible. There was atleast two 69 Dart convertibles that were used on the show, one had GTS emblems on the front fenders one did not. The 68 Dart convertible was originally a red car,on an episode where someone cut his brake lines, the engine bay was red. All of the Dart convertibles were customized by George Barris. The Cuda convertibles were likely all 70 Cudas originally, then were updated to look like 71 Cudas, not the absence of fender louvers,then updated again to look like 72 Cudas. He switched to a 72/73 Challenger sunroof car,with the high back bucket seats swapped out for filming reasons, then he switched to a Camaro in 74 until the end of the series. In the first season he drove a Mercury convertible, and in the second season he drove another Barris creation, a customized Olds Toronado convertible. My wife has been using the DVR to record them, and we have been watching them regularly. Mopar was big on marketing their products on television and in movies.