In 1973, Charles reunited with John Boorman as Associate Producer for Zardoz, edited by John Merritt, photographed by cinematographer Geoffrey Unsworth and starring Sean Connery, Charlotte Rampling and Sara Kestelman.
In 1975, Charles worked as Associate Producer for 20th Century Fox on The Adventure of Sherlock Holmes' Smarter Brother, edited by Jim Clark, starring Gene Wilder (also Writer and Director), Madeleine Kahn, Marty Feldman, Dom DeLuise, Roy Kinnear and John Le Mesurier.