There was supposed to be a third Doris Wishman - Chesty Morgan Collaboration after "Deadly Weapons" (1974) & "Double Agent 73" (1974). But Chesty Morgan wanted to be treated like a Star & turned up late during the filming of "Double Agent 73". She cost one day's shooting. She went to Delancey street for shopping with her boyfriend at the last minute before arriving to the set.
The next day, she lied to Wishman, "I vaz sick". But Wishman found out the truth through the boyfriend. Wishman later said, "Chesty was a horror. Of all the people I worked with, she was the only person I couldn’t get along with."
Because of Morgan's behaviour, Wishman decided to make the sequel to 'Double Agent 73', without Morgan. She didn’t need the aggravation. In the first scene of "The Immortal Three" (1975), a character playing Agent 73 is ki!!ed and three new characters are introduced at her funeral.
("Gigi, Chesty, and The Big D", Marc Edward Heuck, Beverly Cinema, 2022 & "Wishman, Doris", Christopher J. Jarmick, Senses of Cinema, 2002)