In 1989 he started a sideline music career, scoring a UK Top 20 single called Don't it Make You Feel Good, which reached #16 in May of this year. The B side of this was Solo Dancing. Later he released a second single, "This Love Affair", which failed to make the top 40.
After leaving Neighbours the first time, he appeared in such British television programmes as Dream Team, River City, Casualty and The Bill and in the film The Truth About Love.
After his 2004 return to Neighbours Dennis's character Paul has been involved in many of the show's major storylines, including the Bass Strait plane crash. The character had a leg amputated in a particularly strong stretch of episodes which enabled Dennis to show off the full depth and sensitivity of his acting skills. In the final episode of 2005 Paul was attacked by a grieving Harold Bishop (played by Ian Smith).
Prior to becoming an actor, he worked as a chef. He married his wife, Gail Easdale, in 2000 and they have two children together.