In the third episode of the season-long continuity "The Trial of the Time Lord," the Doctor (Colin Baker), on trial for his life, is confronted with videotaped evidence of his "disobedient" behavior on the planet Ravolox. It is up to the Doctor and his companion, Peri (Nicola Bryant), that their mission to Ravolox was intended to rescue the inhabitants from malevolent con artist Glitz (Tony Selby). Written by Robert Holmes and originally telecast on September 20, 1986, Doctor Who: The Trial of a Time Lord, Episode 3 was technically the third chapter of a story arc subtitled "The Mysterious Planet." ~ Hal Erickson, All Movie Guide