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In the 12th episode of the season-long continuity "The Trial of a Time Lord," the Valeyard (Michael Jayston), bent upon condemning the Doctor (Colin Baker) for violating the Laws of Time, argues that the Doctor's videotaped evidence does not correspond with the facts. But the Doctor argues that, contrary to those "facts," he and his companion, Mel (Bonnie Langford), were indeed responsible for rescuing the passengers of the spaceliner Hyperion III from being devoured by a series of ravenous plants -- and that the Hyperion III did not meet its doom in the Black Hole of Tartarus. Written by Pip and Jane Baker and first broadcast on November 22, 1986, Doctor Who: The Trial of a Time Lord, Episode 12 was actually the concluding installment of the four-part story arc "Terror of the Vervoids."