 Although he had pursued amateur theatrics, Lewis was 32 when he committed to acting, joining Robert Carlyle's newly formed Raindog Theatre.During his time with Raindog, he performed in plays such as "One Flew Over the Cockoo's Nest", "Ecstasy", and "Wasted".He also worked with the on "The Grapes of Wrath,"The Arches Theatre Company's production of Harold Pinter's "The Birthday Party," and starred in "One Two Hey" by Glaswegian author James Kelman.