First appearance of the "Mannix Roadster," a customized 1967 Oldsmobile Toronado, created by George Barris.
Last credited appearance of Karla Most.
Mannix without Peggy and his Chrysler convertibles Two fixtures synonymous with the series are absent in these early season 1 episodes; his loyal, smart personal secretary, Peggy; and Joe's signature sports/performance convertibles, first a Plymouth Sebring, and later his Barracuda convertibles. Early in the episode, Joe is driving a customized Olds Toronado convertible, which looks like a George Barris creation.
The tracking device planted in Mannix car is used again in episode 5 as a bomb.