Sergeant Arthur Wilson (John Le Mesurier), a diffident, upper-middle-class chief bank clerk who would quietly question Mainwaring's judgement ("Do you think that's wise, sir?"). Wilson had actually served as a captain during the First World War, but he only reveals this in the final episode. He does not live with the Pike family but is implied to be in a relationship with the widowed Mrs Pike. This hinted relationship would also be mentioned in the later radio series It Sticks Out Half a Mile, set after the end of the war.
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