Dennis Harbour was born in England and made his TV debut in 2003 at the BDO World Championship. In the first round he beat James Wade 3 - 2 before losing out the Mervyn King. Harbour again played at Lakeside in 2006 losing narrowly to eventual champion Jelle Klaasen 2 - 3 in the opening round.

Harbour's only other appearance in a major televised event came in the 2004 UK Open. He played some excellent darts beating young star Adrian Lewis
8 - 7 in the 4th Round. His run came to an end in the last 32 losing 6 - 8 to Wayne Mardle in a very close match.