Crispin trained at RADA. Extensive work in various Regional Theatres in numerous productions, include leading roles in Chips with Everything, The Provoked Wife, Dead Men, The Normal Heart, Cabaret, Wilfred, An Ideal Husband, The Wild Duck, The Park, and Hamlet.
Touring: Private Lives, Dinner, The Tempest, Camille, The Country Wife and Sir Humphrey Appleby in Yes, Prime Minister. For the RSC/Lyric, Hammersmith: The Dispute and The Prince of Homburg. For the National Theatre: A Question of Attribution, Hamlet, The Voysey Inheritance, Napoli Millionara and Richard III. In London: Peggy For You (Comedy), An Inspector Calls (Garrick), The Way of the World ( Lyric, Hammersmith), The False Servant ( The Gate), Relative Values ( Savoy), Henry IV ( Wyndhams), Camille, ( Lyric, Hammersmith) and The Island of Slaves ( Lyric, Hammersmith). Television: Queens, Armada: Twelve days to save England, New Tricks, Endeavour, Law & Order:UK, John Adams, Half Broken Things, Whistleblower, Lewis, Shadow in the North, Rise and Fall of Rome, Gil Mayo Mysteries, The Impressionists, The Somme, The Elgin Marbles, Byron, Trust, Ultimate Force, Victoria and Albert, East Enders, Bad Blood, The Bill, Call Red, The Politician’s Wife, The Glass Virgin. Film: The Innocent Sleep, Another Country. Radio: Little Nell, Lewis Carroll goes to Russia, The Bell, For the Term of his Natural Life and Napoli Millionara.