77 Sunset Strip

In the episode,the registration card in Delores'car's sun visor has her last name Carlyle:but the closing credits credit her as Carlysle.

During the scene where Kookie gives Tina the car to go to J.R.'s,the microphone can be seen reflecting off the car's windshield.

The murder Richard Long plans in this episode is a remake of sorts of Hitchcock's "Dial M for Murder". This is the second time Richard Long guest starred as a villain using Hitchock plots to plan his murder. The first being "One False Step"...a lift from Hitchcock's "Strangers on a Train".

This episode was based on Alfred Hitchcock's "Strangers on a Train", adapted by Raymond Chandler and Czenzi Ormonde from the novel by Patricia Highsmith. Later in the first season, Richard Long guest starred in "The Fifth Stair", another murder plot based on a Hitchcock movie, "Dial M for Murder".