Anecdotes

The book read by Ken O'Hara before he accepts his assignment is "The Witness" by Sandra Brown.

The final fight scene between Darren Shahlavi and Gary Daniels took ten days to film.

During the three on one fight in Kelly's apartment, the Killer performs the Iron Crotch technique to trap Kelly's foot and drag her across the floor. This is a mythical Kung Fu technique ascribed to the villainous Monk Pai Mei and was performed by actor Lo Lieh in his many appearances as the character on film.

Out of the seven movies he wrote for the Seasonal Film Corporation, Keith W. Strandberg cites this as his personal best.

One of the victims' names mentioned is Kurt McKinney, named after the star of No Retreat, No Surrender, which was Seasonal Film's first U.S. Hong Kong-crossover film.