psychotricorder
Star Trek: The Original Series
Episode: TOS 036 - Catspaw
A Federation instrument used to scan and record past memories. In 2267, Captain Kirk ordered a 24-hour regressive memory test using a psychotricorder on Engineer Montgomery Scott after he was accused of murder while planet-side on Argelius II. The test was abruptly halted, however, when the psych technician, Karen Tracy, was the second to be murdered by the malevolent entity occupying Engineer Scott's body.
