â¢ Friedrich and Olejniczak, Evaluation of Carcinogenicity Studies of Medicinal Products for Human Use Authorised by the European Centralised Procedure (1995-2009) Regulatory Toxicology and Pharmacology, 2011 â(94/144) 65% cmpdstested positive, but only (11/94) 11% considered to hold human relevance 6
Talk0 Share. Clarabell the Clown was the mute partner of Howdy Doody. Three actors played Clarabell. The first was Bob Keeshan, who later became Captain Kangaroo. Keeshan was succeeded by Robert Nick Nicholson, who also played the character of J. Cornelius Cobb on The Howdy Doody Show.
When The Howdy Doody Show finally ended in 1960, Clarabell had a most shocking surprise to share with the television audience â it turned out he really could speak! With teary eyes and a cracking voice, he uttered the only two words ever spoken by the character, âGoodbye Kids.â Seconds later, the show faded to black.