Poor old Rex Harrison ("Denant") is taking a stroll though a foggy park when he gets involved in a tragic contretemps with a prostitute and an undercover police officer. The ensuing fracas sees the officer fall to the ground where he bangs his head on the leg of a bench and dies. "Denant" stays put, owns up and throws himself on the mercy of the court - and a sentence of three years is his reward. He manages to escape, though, and with the help of a young girl "Dora" (Peggy Cummins) manages to lead the pursuing police - led by William Hartnell - a merry dance. I've got to say, though, that…