The Young Poisoner's Handbook (1995)

The Young Poisoner's Handbook
Comedy, Crime, Drama
Graham Young is a teenage misfit living in suburban London in the 1960s. He hates his stepmother but loves chemistry, and the two impulses unite in a wicked plot to slowly poison her. After she dies, he's found guilty and sent to a psychiatric hospital, where an idealistic doctor thinks he can be cured.
Starring
Hugh O'Conor, Antony Sher, Ruth Sheen, Roger Lloyd Pack, Charlotte Coleman, Paul Stacey, John Thomson, Jack Deam, Charlie Creed-Miles, Robert Demeger
Directed By
Benjamin Ross