A Shot in the Dark came out the same year as The Pink Panther, the film that introduced the world to the bumbling French detective Inspector Clouseau. In this second installment, a man has been murdered and all the evidence points directly to the beautiful Elke Sommer (including the murder weapon, which she's holding as she stands over the body!). Clouseau, of course, insists she's innocent and that he will prove it! Which just accelerates the process of driving his boss (Herbert Lom) insane.
This film was actually supposed to happen before "The Pink Panther". It was still one of Sellers best.