Two warring elderly brothers and their respective heirs are determined that each will outlive the other in an attempt to hold onto the family fortune, and will stop at nothing - even murder - to achieve their goal. Bryan Forbes' riotous black comedy, based on the 1889 novel by Robert Louis Stevenson and Lloyd Osbourne, stars some of the greatest talents of the day, including Peter Sellers, Michael Caine, Peter Cook, Dudley Moore, Tony Hancock, Ralph Richardson, Nanette Newman and John Mills.