[1] In 1997, he appeared in the ITV soap opera Coronation Street from March to May playing Ray Thorpe, a decorator.
[2] A year later, Walker began appearing in the BBC drama series Playing the Field as main character Matthew Mullen.
[3] Then in 2001, he joined the cast of the BBC procedural drama Merseybeat as PC Larry 'Tiger' Barton, a role he portrayed until 2004.
[4] In December 2005, he returned to Coronation Street, playing reformed killer Ed Jackson until March 2006.
[5] In 2009, Walker began portraying the role of Rob Hollins in the BBC soap opera Doctors.