The Odd Job (1978)

Arthur Harris is a happily-married man who returns from his job to discover that his wife, Fiona, is leaving him. Devastated, he gets really drunk and tries to commit suicide. After a few setbacks, while he is trying to electrocute himself with a lamp, the doorbell rings. An odd man in a leather coat asks if there are any odd jobs that he can perform. Arthur hires the man to kill him. The next day his wife returns, but the man he hired is still trying to kill him.