After the first day's shooting, Sellers sprained his ankle while leaving a restaurant and could no longer work in the cramped cockpit set. Kubrick then re-cast Slim Pickens as Kong. The three roles Sellers undertook were distinct, "variegated, complex and refined", and critic Alexander Walker considered that these roles "showed his genius at full stretch". Sellers played Muffley as a bland, placid intellectual in the mould of Adlai Stevenson; he played Mandrake as an unflappable Englishman; and Dr. Strangelove, a character influenced by pre-war German cinema, as a wheelchair-bound fanatic. The critic for "The Times" wrote that the film includes, "three remarkable performances from Mr. Peter Sellers, masterly as the President, diverting as a revue-sketch ex-Nazi US Scientist ... and acceptable as an RAF officer," although the critic from "The Guardian" thought his portrayal of the RAF officer alone was, "worth the price of an admission ticket". For his performance in all three roles, Sellers was nominated for an Academy Award for Best Actor at the 37th Academy Awards, and the Best British Actor award at the 18th British Academy Film Awards.