<Tr> <Th> Followed by </Th> <Td> Clifford's Puppy Days </Td> </Tr> <P> Clifford the Big Red Dog is an American - British educational animated children's television series, based upon Norman Bridwell's children's book series of the same name . Produced by Scholastic Productions, it originally aired on PBS Kids from September 4, 2000 to February 25, 2003 . The UK version (where it was dubbed with British voice actors replacing the original American soundtrack) originally aired on BBC 2 on 1 April 2002 . </P> <P> John Ritter voiced Clifford in all episodes . This was originally done by Brent Titcomb in the 1988 direct - to - video series . Generally speaking, Ritter's schedule dictated the production of Clifford the Big Red Dog . By the time the last of the 68 half - hour cartoons and the subsequent film Clifford's Really Big Movie were completed, Ritter was back on ABC's prime - time schedule, starring in 8 Simple Rules . Ritter's death on September 11, 2003 came less than a week before PBS debuted Clifford's Puppy Days, a show that kept Clifford's legacy going . </P> <P> While no new Clifford episodes have been released since Ritter's death in 2003, voice actors for the main characters have reprised some of their roles for the Ready to Learn PBS Kids PSAs . Clifford's Really Big Movie serves as the series finale due to Ritter's death, as no new episodes were made to continue from where it left off . However, Clifford's Puppy Days still continued to air until its cancellation in 2006 . </P>

Who was the voice of clifford the big red dog