The Pink Panther Diamond is stolen once more, this time from a museum in a small, European country. When it appears that thought-to-be retired master thief Sir Charles Lytton (Christopher Plummer taking over for David Niven) is responsible, disgraced beat cop Clouseau (Peter Sellers) is promoted again to his position of Inspector, much to the dismay of his unhinged superior officer (Herbert Lom). The fourth entry in the Pink Panther series (the third with Sellers) has a good reputation among critics and fans, but is really just more of the same, with Blake Edwards rehashing the gags that worked best in the first two installments, some of which are still extremely funny.