"My Son the Fanatic" tells of a humble, hardworking East Indian taxi driver and family man (Puri) in England who finds himself caught between a religious zealot son and a prostitute fare who befriends him (Griffiths) squeezing him into making decisions about duty and happiness. A light hearted dramedy with the usual Brit flick austerity, "My Son...." is a warm-hearted film about choices for more mature audiences. (B)