Splitting Heirs

Idle stars as the offspring of titled parents who is accidentally abandoned in a restaurant as an infant and raised by poor Pakistanis. (His mother winds up claiming the wrong abandoned baby.) When he discovers he's actually the 15th Duke of Bournemouth he plots, ineffectually, to kill off the present unknowing imposter, a nitwit American (Moranis). Cleese pops in as a shabby lawyer hired by Idle to help him claim the title with Hershey as Idle's real mother, the addle-brained and sex-starved Duchess. Convoluted plot, bland comedy.