Picha 's next film was the 1980 film '' The Missing Link '' . Though it was n't as successful as '' Tarzoon '' , the film was entered into the 1980 Cannes Film Festival . Picha also adapted the film into a comic strip . In 1984 , the film was released into the U.S. under the title '' B.C. Rock '' . Major changes to the film included newly written dialogue by the comedy duo The Funny Boys ( Jim Vallely and Jonathan Schmock ) , recut footage , different voices , different instrumental score , the absence of the narrator ( with the main character telling the story ) , and nearly all the songs written and performed by Leo Sayer have been replaced by songs by other artists ( including Steel Breeze , Hall & Oates , and Rick Wakeman ) in order to attract a wider audience . Unfortunately , the film was poorly promoted on video and faded into obscurity . However , this version manages to have a cult following to this day . Picha 's future work would never be released in American theaters or any home video format
1980 Cannes Film Festival
1980 Cannes Film Festival
Picha