Marshall fronted the Health and Safety Executive's ladder safety campaign in June 2007.
Marshall appeared as Herr Schultz in the stage adaptation of Cabaret in 1995.
Marshall appeared as his Life on Mars character DC Chris Skelton in a commercial for Children in Need 2007.
In May 2007, Marshall appeared as Tony in the stage production of Up 'n' Under at Tameside Hippodrome Theatre.
Marshall's first stage performance was as a gorillagram in Where Did You Last See Your Trousers in 1992.
In 2006, Marshall appeared as Phil in Daybreak on Radio 4.
Marshall appeared as Linton in Wuthering Heights at York Theatre Royal in June 2007.
He has many sporting skills which include football, snooker, athletics, and boxing.
He was a member of the Macclesfield Amateur Dramatic Society.
He used to attend Paragon Youth Theatre in Macclesfield.
He is a former member of the Macclesfield-based theatre group SCAMPS Youth Company.
He has a strong high baritone singing voice.
He is an avid supporter of Macclesfield Town Football Club.
He owns a Staffordshire Bull Terrier called Lola.
Marshall is 5' 7" (1.70 m) tall.
Marshall has brown hair and one blue and one green eye.
Marshall: (on working on Coronation Street) On my first day I walked in the café, Roy's Rolls, and Liz Dawn (Vera Duckworth) was there. She said to me, `It's just like any other Monday morning to me, love, but then again, I've been here 25 years'.
Marshall: (on his memories of the 1970s) I just remember everyone having long hair. And then there's the Chopper bikes with the gear stick in the middle, all the cool games of the Seventies.
Marshall: (on the US remake of Life on Mars) It will be interesting, but why do they have to make their own version? Why can't they be happy with what they've got? I don't understand it.