McMillan & Wife - Season 4 (1974)

When multi-millionaire Maxwell Abbott dies, he arranges for 5 couples to participate in a winner-take-all automobile rally using his collection of classic cars. The prize: the vintage cars themselves, valued at nearly $2 million. McMillan was an old friend of Abbott's and he's pledged the collection to the police benevolent fund if he wins. It soon becomes apparent that someone is prepared to win at all costs. Forced to use Sally's old car after someone disables the classic Corvette they were supposed to use, the McMillan's set off but not before others have found ...

Mac and Sally find themselves investigating a murder when their host, Ewing Webley, is murdered. Webley is a very rich man having made his fortune in the insurance industry and is survived by his son Walter and his much younger wife, Rachel. Many people had a motive for killing him. His wife may have been having an affair with tennis pro Ilia Astrov who's just had his sponsorship terminated by the now dead man; as well, the man didn't see eye to eye with his son who felt diminished by his father's success. In his will, Ewing Hubley left most of his estate to his son ...

In the second episode to discuss Mac's past life as a CIA operative, he's called on by his old boss to help investigate a "sleeper," a Communist agent who has lived undetected in the United States and adopted American customs until it's his -- or her -- moment to strike. An upcoming U.S.-Soviet intelligence summit is the apparent moment. The sleeper could be anybody, even Mac's intelligence buddy, because he or she is thoroughly Americanized and could be engaged in anything, including counterintelligence. Throw in several Soviet hit men assigned to waste the sleeper ...