Arnold Yarrow
From Tardis Wiki, the free Doctor Who reference
Arnold Yarrow (born 17 April 1920[1]) played Bellal in the Doctor Who television story Death to the Daleks.
He shared his memories of the story on the documentary Beneath the City of the Exxilons.
He is the sixth actor from Doctor Who to reach his 100th birthday, after Lewis Alexander, Zohra Sehgal, Olaf Pooley, Peggy Batchelor and Earl Cameron. He is currently the oldest living and longest lived actor to have appeared in the series.