(Season 2, Episode 6; Airdate: 10/21/71)
Heyes and Curry are hired by a man to track down his runaway wife — whom it appears has taken up with another man — and deliver a letter imploring her to return home to him. With some difficulty, they manage that task only to become involved in a murder investigation, in which a book by Mark Twain plays a huge part. Monte Markham and Meredith MacRae guest-star.