User:SOTO/Forum Archive/The Panopticon/@comment-1293767-20151029072618/@comment-1827503-20160110021747
From Tardis Wiki, the free Doctor Who reference
Donna Noble in Doomsday and Santa Claus in Death in Heaven are irrelevant to this if we define "consecutive run" as excluding all Christmas specials other than The End of Time. This leaves Churchill in The Beast Below as the only character we absolutely have to work around.