Dastor was born in India and raised in a Parsi family of Zoroastrian faith, though he later converted to Christianity.
[2][3] He studied at the Royal Academy of Dramatic Art (RADA) and joined the National Theatre, where he was under the direction of Sir Laurence Olivier.
Dastor also appeared in three of Simon Gray's plays: Melon, Hidden Laughter, and Cell Mates.
His most notable roles include Cassius Chaerea in the 1976 BBC adaptation of I, Claudius and Gandhi in both Lord Mountbatten: The Last Viceroy and the film Jinnah.
[4] Other credits include Coronation Street (as Jimmy, a Weatherfield Market trader in October 1981), Softly, Softly, Space: 1999, Blake's 7, Shoestring, Yes Minister, Fortunes of War, A Touch of Frost and Spooks.