Lily Collins as Athena/Arabella Mikaelson
Christopher Eccleston as The Ninth Doctor
Billie Piper as Rose Tyler
Camille Coduri as Jackie Tyler
Noel Clarke as Mickey Smith
John Barrowman as Jack Harkness
Casper Zafar as Finn Mikaelson
Daniel Gillies as Elijah Mikaelson
Joseph Morgan as Klaus Mikaelson
Brenton Thwaites as Kol Mikaelson
Claire Holt as Rebekah Mikaelson
***
David Tennant as The Tenth Doctor