An Alistair Sim/Terry-Thomas double bill. In 'School for Scoundrels' Henry Palfrey (Ian Carmichael) is one of life's losers. Despised and disregarded at work, his prospective girlfriend April (Janette Scott) is whisked from under his nose by charming bounder Raymond Delauney (Terry-Thomas). In desperation, Henry enrols at Stephen Potter's (Alastair Sim) College of Lifemanship, where he gradually learns how to get one up on the other fellow. Whilst in 'The Green Man' a seemingly mild-mannered watchmaker Hawkins (Sim) is in fact a skilled assassin. His latest target is leading politician Sir Gregory Upshot (Raymond Huntley), who is due to stay the weekend at the Green Man hotel. However, Hawkins' well-planned attempts to remove Sir Gregory permanently from public life are frustrated by well-meaning vacuum cleaner salesman William Blake (George Cole).