Adam Thompson thinks one of his nephews, Harry Thompson or Elliott Carter, is rifling the house. He sets up an infrared camera near a wall safe to catch the thief. Adam openly marks a survey map to indicate property that he will soon buy, which his assistant, Ellen Foster, puts in the safe. Unknown to Adam, Frank Jarrett as "Norman Durston," puts up earnest money to buy the precise tract drawn on the map. Adam consults with Perry Mason to find out how the land was sold from under him without the safe having been opened. Adam reveals that he never intended to buy the land, but drew the map as a ruse for the thief. Jarrett, needing money, blackmails Victor Logan over a problem with Logan's credentials. Perry and Paul Drake find Jarrett's body in a running auto in his garage. Later, Harry is discovered rifling Jarrett's office and is arrested for murder. Lydia Logan, Victor's daughter and Harry's fiancée, asks Perry to defend them both. Written by
Did You Know?
The opening scene wall safe combination is Right 80, Left 20, Right 80. See more
In the opening scene, Adam Thompson (Will Wright
) tests a security camera, set to take a picture of anyone opening his wall safe, by opening the safe himself. At the time, he is wearing a gray tweed suit with a striped shirt. However, in the resulting picture, he is wearing a solid black suit and a plain white shirt. See more
The shutter's muffled and can't be heard. The light's infrared and can't be seen. It's a brand-new model. Automatic and foolproof. As soon as that safe door opens, the picture's snapped. Since you already have a darkroom here in the house, you don't even have to call us to develop it. We've found it the most effective discourager of burglaries yet devised.