Dr. Josser, K.C. (1931)

"P. C. Josser is a dud, and his superiors know it. Given a chance to distinguish himself at a night club, he mistakes his comrades for crooks and bowls them over like nine-pins. Dismissed the force, he becomes a private detective, and has for a client a young lady racehorse owner. Disguised as a stableman, he guards the favourite, but the animal is drugged and the girl's sweetheart suspected. At his trial, Josser proves an eccentric witness, soon rescues the innocent man from prison, and disentangles the remaining knotty problem." (From Original Herald)