The footage of the medical team trying to save the policeman's life is taken from Pig in a Blanket (1972).
The Asiam cargo company truck Chin is driving near the end was also the name of the cargo and freight company in the season four show "Air Cargo - Dial for Murder".
Danny Goldman (who plays the bookish serial killer Eddie Josephs) was a longtime character actor who was perhaps best known for being the voice of Brainy Smurf on The Smurfs (1981) cartoon in the 1980s.