Masters visited the Wenley Moor nuclear research facility when a series of power drains and mental breakdowns were caused by the Silurians, whom had recently been awakened from their hibernation units. During his visit, the station security chief, Major Baker, was infected with the Silurian virus. Masters left before the base was quarantined, unaware of being infected himself. Masters reached London, eluding search parties looking for him. He was caught by two police officers on a bridge. Masters then slumped and died from the virus. (TV: Doctor Who and the Silurians)