Many of its series—particularly the productions of the late 1970s and 1980s—are notable for imparting a simple moral or life-lesson (explained by a key character, in a child-friendly manner) in the epilogue. The studio created very few original animated characters. Two examples were Fraidy Cat, a timid feline who has lost eight of his nine lives, which come back to haunt him; and Wacky and Packy, a caveman and his pet mammoth (Packy refers to the latter character being a "pachyderm") who enter the modern age through a time warp. Both of these originally aired as segments of the "Uncle Croc's Block" series on ABC (hosted by Charles Nelson Reilly). In a period where comedy in cartoons was heavily scrutinized for violence and many shows duplicated the popular "Scooby-Doo" format, Filmation's strong point was its adaptations of popular television series, movies, and other works, although at least one series, "M*U*S*H" (the third animated segment on "Uncle Croc's Block"), while not a direct adaptation, was inspired by the film (and later TV series) "M*A*S*H". Filmation incorporated live-action into some of its animated series. Series like "The Hardy Boys" and "Archie's Funhouse" featured live-action footage of an audience watching the bands perform and "Fat Albert" had segments featuring series creator Bill Cosby. "The Kid Super Power Hour with Shazam!", was more of a hybrid—a live-action variety show with animated segments. Actors appeared as characters from the "Hero High" portion of the series, singing songs, and telling jokes. Filmation made six fully live-action series, including "Space Academy", its spin-off "Jason of Star Command", "Ark II", "Shazam!" (based on the DC Comics character Captain Marvel), "The Ghost Busters", and "The Secrets of Isis". Filmation produced a live-action series called "The Ghost Busters" (1975) starring former "F Troop" stars Larry Storch and Forrest Tucker, with noted science-fiction fan and collector Bob Burns as "Tracy the Gorilla". The characters worked as paranormal investigators, working for an unseen "Chief" named "Zero" who delivered their "Ghost Busting Assignments" in whimsical disguised recording devices as in "". Nine years later, Columbia Pictures, who produced an unrelated 1984 movie of almost the same name, had to obtain the rights to the title from the company.