When Deimos, who is the owner of a pawnshop, receives the visit of Phobos, they present their Martian identification to each other. Deimos is a Martian agent based in an outpost on Earth disguised of pawnshop a long time ago to observe the Earthlings. Phobos is a supervisor with a time controlling device worried with the atomic energy that has come to understand what a murder is. Soon they receive a message to go to a low budget hotel to witness a murder in the lobby of the hotel. When they arrive, they identify the blonde Carla Duveen that is waiting for her boyfriend Bert Hamill that has had sex with his lover. Phobos uses the time controlling devise to repeat the murder many times to understand the details. However the experiment runs out of control and they receive a report that the future will be affected by the event. Will they fix the problem?
"Controlled Experiment" is a silly but also funny episode of "The Outer Limits". The genre comedy does not fit well to the sci-fi genre, but the episode is entertaining despite the repetitions of the same scenes. The romantic conclusion is not well resolved with Phobos interference in the timeline but is commercially attractive. My vote is seven.
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Title (Brazil): "Experimento Controlado" ("Controlled Experiment")