The Harts find themselves in the middle of a dangerous murder plot, but it isn't clear if the plot is a famous author's fictional murder-mystery, or an actual murder plot, until Jonathan finds himself the unsuspecting target of a killer. It begins to look like the culprit behind the plot is an old friend, Frank Crane (Mike Farrell), but there may be a connection to a corporate takeover of Hart Industries as well. Lionel Stander reprises his role as the faithful Max, who helps investigate the business angle.
There's an Agatha Christie vibe here with a secluded setting, assortment of suspicious characters, and bodies piling up in the drawing room. It's a fun and lively mystery that starts well and ends satisfactory. Much better than Hart to Hart returns. James Shigeta plays interesting detective with a deadpan delivery.