Premise: Mick Walter (born Michael E. Walter in Huddersfield, Yorkshire, in 1955), often referred to by the stage name Big Mick, is an English actor. He is known for appearing in television comedies, first appearing as Jack Large in "Blackadder". He has also appeared in "Black Books", "Green Wing" and "Psychoville".
Hypothesis: Mick Walter did not appear as Jack Large in "Black Books".