Michael Conrad was known for his portrayal of SGT. Phil Esterhaus in the 1980's cop show "Hill Street Blues".
J.D. Cannon was well known for playing Chief of Detectives Peter B. Clifford, NYPD on the TV series McCloud.
The good inspector goes undercover as a mental patient to see if the bad guy (Tabor) is faking a mental breakdown to avoid testifying in a federal case. The question never answered was if Tabor were truly faking or if he did indeed have a dehabilitating mental condition. So maybe he did not go "mad by mistake."
By the way, no interesting cars.
This is Anthony Eisley´s only appearance as Special Agent Kirby Greene; the part was later played by Grant Williams, James McKrell, and Phil Dean. Eisley went on to play Special Agent Chester "Chet" Randolph in more than a dozen episodes of "The F.B.I.".