Joe Mannix (Mike Connors) was a private investigator that worked for a computer company known as Intertect. Keep in mind that this is 1967, so we are talking about computers that fill rooms and use punch cards.

Looking up the 24 episodes on IMDB, I could not help but noticing a fair amount of special guests: Tom Skerritt, Neil Diamond, Neil Young, Stephen Stills, Richard Mulligan, Norman Fell, Army Archerd, Rona Barrett, and Karen Black.

The only bonus I know of will be a new interview with Connors.