AllMovie

When Higgins (John Hillerman) is stunned into semi-consciousness by an errant croquet ball, Magnum (Tom Selleck) must take over supervision of a "Great Gatsby" costume ball held at the Masters Estate. In the course of the evening, some valuable jewels are stolen, and the chief suspect is none other than Higgins--who, still in a daze, imagines himself to be that eminent Shakespearean actor "Sir Fearing Pangborn." In order to solve the case and clear Higgins, Magnum must rely on his knowledge of Agatha Christie mysteries, as gleaned from a recent movie marathon on TV. Part of the fun in this episode is watching the series regulars cavorting in their celebrity costumes, with Magnum dressed Dashiel Hammett, Rick (Larry Manetti) made up as Charlie Chaplin, and T.C. (Roger E. Mosely posing as Paul Robeson in the role of "The Emperor Jones"!