Burke's Law (1963) : 1x13

When an unidentified brunette is discovered in a fake electric chair at a run-down amusement park/sideshow run by ""Professor"" Kingston, Burke has to track several elusive clues back to a modeling agency and the three somewhat odd people who run it, a blackmail scheme, eloping tennis players, and a feisty old Irish landlady. With the help of a vital piece of information gathered by Burke's girlfriend Juliet and the assistance of three young boys, the case is solved.