"Uncle Croc's Block," an hour-long action series for children that starred Charles Nelson Reilly in the title role, premiered on ABC-TV Saturday, Sept. 6, 1975 at 10:30 to 11:30 a.m. Starring with Reilly are Jonathan Harris as Bitterbottom and Johnny Silver as Rabbit Ears. The live action segments will serve as a wraparound for animated segments of "Fraid E. Cat," featuring the nervous feline who has already used up eight lives; "M-U-S-H" (Many, Unwanted, Shabby Heroes); "Wacky and Packy," the wayout Neanderthal duo who find themselves in modern times; and "Super Fiends." Produced by Lou Scheimer, Norm Prescott and Dick Rosenbloom, the comedy-satire series centers on an actor who hosts a children's show in a crocodile costume; his sidekick Rabbit Ears, who is dressed as an oversized pink rabbit; and their frustrated director, Mr. Bitterbottom. Cameo appearances by a variety of "stars" — including Steve Exhaustion, the $6.95 Man; Old Fogey Bear, Captain Marbles and Shyiock Domes — will be a regular part of the series.