David Callan Sydney. David Callan David Callan is an actor and standup comedian based in Sydney, Australia. He is a former employee of ASIO; his comedy material is partly based on his experiences as a spy. In the 2011 sitcom "At Home with Julia", he played the recurring role of Agent Smith, one of the Australian Federal Police agents on the Prime Minister's security detail. In 2012, he appeared in two episodes of the TV series "Rake". He is sometimes confused with Dave Callan, another Australian standup comedian with an almost identical name. Callan has a wife and two children and lives
H. G. Callan H. G. Callan Harold Garnet Callan FRS FRSE (15 March 1917, Maidenhead – 3 November 1993), known as Mick Callan, was an English zoologist and cytologist. He is especially remembered for his work on Lampbrush chromosomes. see Callan was born in Maidenhead in Berkshire the son of Garnet George Callan, a naval architect, and Winifred Edith Brazier, a teacher. He was educated at King's College School in Wimbledon, and then won a place at St John's College at Oxford University graduating with a First Class MA in Zoology in 1938. After initially finding employment at the John Innes Institute in