Happy Birthday, Deborah Watling!
Happy Birthday, Frazer Hines!
Companions of the Second Doctor
LLEWELLYN: Maybe they’re [the Sycorax] not actual Martians.
MAJOR BLAKE: Of course not. Martians look completely different.
— The Christmas Invasion
TENTH DOCTOR: They tell legends of Mars from long ago, of a fine and noble race who built an empire out of snow. The Ice Warriors.
— The Waters of Mars
The Ice Warriors was the last time the TARDIS doors opened outward until The Eleventh Hour.