In 1990, Jack appeared in the Granada TV Soap Opera Families a show about two families one from Cheshire, the other in Australia, notably alongside the then not so well known Jude Law.
In 1992 he appeared in a few episodes of Heartbeat as Alan Maskell. He also appeared in the TV mini series The Life and Times of Henry Pratt. He played the lead role as older Henry Pratt, little Henry Pratt was played by Andrew Nicholson and young Henry Pratt played by Bryan Dick.
In 1993 he played Vinnie, a young soldier for the Kings Fusiliers in the award winning British drama Soldier Soldier. He later joined the cast of Clocking Off, written by Paul Abbott.
In 1996 he briefly appeared as a policeman in Jimmy McGovern's one-off drama for ITV Hillsborough, based on the 1989 Hillsborough Disaster.
In 1999 he appeared in an episode of Queer As Folk, as a Doctor Who obsessed fan, and had a one-night stand with Vince, one of the protagonists, before taking the role of rapist Phil Simmonds on the top rated ITV1 soap opera Coronation Street in 2000.
In January 2007 he took part in The Afternoon Play, a daytime BBC daytime series consisting of short stories. Deam is now playing the part of a policeman in DCI Banks.
2014 sees Deam in a play called Blindsided, by Simon Stephens, at the Royal Exchange, Manchester, alongside ex-Coronation Street Julie Hesmondhalgh.