Logan (Doctor Who and the Rocks from Venus)

Professor Logan was a scientist who claimed to have planned and executed the first manned mission to Venus. As UNIT had funded the project, the Brigadier sent the Third Doctor to investigate Logan's claims prior to agreeing to further funding. The Doctor examined some Venusian rock samples and discovered that they were actually from Earth. Upon further investigation, he deduced that Professor Logan had faked the mission to use UNIT's funding to pay for the upkeep of his ancestral home. To keep the Doctor quiet, Logan had the Doctor placed in a rocket and launched into space. However, the Doctor took control of the rocket and threatened to crash it into Logan's castle. Logan confessed his fraud and the Doctor returned to Earth. (TVC: Doctor Who and the Rocks from Venus)