Steele's car is a 1959 Ford Sunliner. Kim's taxi is a 1959 Ford Galaxie.
When Carlton is on his way to his final meeting with Omori, he stops and picks up a girl in front of the Hunter Tea Company. This storefront was previously seen - and figured prominently - in the earlier episode Waikiki Widow (1959).
The first of four episodes directed by the renowned Andre DeToth, who was most famous for directing the 3-D classic "House of Wax."
This was Troy Donahue's first appearance on the show. He made another guest shot that season before permanently joining the cast as Philip Barton in the fourth season.