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.")

Intro: You know you're in trouble when an oracle controls your gene banks. But that is only one of the surprises that await The Doctor and Leela as they travel to the edge of creation to uncover the "Underworld."

Outro: 1956 brought The Invasion of the Body Snatchers. 1957, The Invasion of the Saucer Men. 1973, The Invasion of the Bee Girls. But, they are as nothing to what will occur next Sunday night at 11: "The Invasion of Time." [source: ChicagoEpguides]