A gangster's widow (Jo Van Fleet) hires Mannix, facing prison on theft and murder charges, as her bodyguard; guest James B. Sikking.
Stone tries to link the shootings of a college coed and a professor; guests Celeste Holm, Nick Nolte.
The never-helpful Dr. Smith accidentally launches the Space Pod into space while the lower half of the Robot is on board! Will he and the Robinsons retrieve it and put their beloved helpmate back together again?