Of the three shows under the supervision of Herb Solow at Desilu in the 60's that led to the Renaissance (and, allegedly, near bankruptcy) of the studio, Mannix is the one I'd never heard of before becoming interested in researching the behind the scenes story of Star Trek. I'd read that Trek's casting director would hire actors for appearances on three of Trek, Mission, Lucy and Mannix in one go. You can see this when you watch Mission on DVD, and now, thanks to Youtube, I've been checking out dozens of Trek guest actors playing crooks, gangsters, murder victims, and jealous wives on Mannix as well. Already in the first dozen episodes of Season 1 I've seen Roger Korby, Kor, Lenore Karidian , Commodore Stocker and many others, with fight scenes being conducted to the tune of the Desilu music department. Once, when someone operated an elevator, the Enterprise photon torpedo sound was used! Mannix season 1 ran concurrently with TOS season 2, and to my amazement went on well into the 70's...longer even than Mission. Anyone wanting to have a look should probably do so quickly. I can't imagine Paramount will allow whole seasons to remain up for long. Just search 'Mannix Season 1' on YT. Has anyone seen the later seasons? Is it worth buying them on DVD, or will it be dull without all the Trek guest actors when they disappear after season 2? Anyway, I've been enjoying this tough guy with a heart of gold cracking these cases...it's given me an insight into what the fashions, cars and technology of 1967 were like when TOS was blazing its trail a couple of soundstages down the road.