ChicagoEpguides reported that at 0:22:42 the voiceover from Howard da Silva at the beginning of episode 2 is mistakenly retained ("The signal from the missing ship grows stronger as the crew plummets to the underworld.")

Outro: Be with us next Sunday night at 11:00 when The Doctor brings all his Time Lordly powers into play in confronting "The Invasion of Time." [source: ChicagoEpguides]