During one scene, Reed asks Malloy if he would be interested in flying in the police helicopter. Malloy's response is, "maybe in five or six years". Five years later, they get their chance in Skywatch: Part 1 (1974)/Skywatch: Part 2 (1974) when the two officers are temporarily assigned to the LAPD helicopter patrol.
Kenneth Tobey, playing Lt. King of the Astro Division, is appropriate for bringing in the helicopters. From 1957-60, he was one of the two stars of Whirlybirds (1957).
In the safe scene, the tool used to manipulate the lock bolt that someone claimed to have built is a hoistway drop key used in the elevator trade.
A rare occasion when Reed, when with Malloy, drives the police cruiser while Malloy is in pursuit of the suspects on foot.
The Police helicopter is a 1968 BELL 47G-5 Rotorcraft #N4798R.