Over the years, Arnold has made extensive TV and radio appearances, including his own BBC Radio 4 series, Arnold Brown & Company, in 1990 and 1991 and a BBC2 sitcom, The Brown Man, which aired in October 1993.
He has become something of a radio favourite and in 1998 he presented two documentaries on the Montreal Just For Laughs comedy festival for BBC Radio 2.
He also appeared on The Beaton Generation. Stand Up 2, 2000. Appearances include Talking Pictures, Live From London, and BBC Radio 4's Word of Mouth.
He has appeared in several plays for Radio 4 , including Bruce Morton's , A Sense of Balance, Ian Macpherson's All You Need Is Frank, and One Foot in the Cuckoo's Nest by Ian Macpherson an Magi Gibson.
He is a regular contributor on the Fred Macaulay Show and had his own series on Radio Scotland, Arnold Brown in the Comedy Chair.
Arnold has also written and presented on radio his personal take on several subjects, including the work of Ivor Cutler.
Television credits include The History of Alternative Comedy, Life According to Fred, and Sex Wars.
Arnold has also appeared in major feature films - Personal Services, Comfort and Joy, released in 1999 and Esther Kahn in 2000. Liam followed in 2001, Young Adam in 2002 and Gamerz in 2006.