The Edge of Destruction (airdate June 1, 1986)
Intro: Who or what is responsible for the fault in the guidance system of the TARDIS? The truth will be manifest before the night is out, as we journey toward "The Edge of Destruction."
"Next Week": On the planet Marinus [pronounced ma-REE-nus], the sand is glass and the sea is acid. Next stop for the TARDIS, an island in that acid ocean. Be with us next Sunday night at 11 when the Doctor begins the search for "The Keys of Marinus."