[youtube=http://www.youtube.com/watch?v=DUm5rM4fQxs] Paul McGann – Christopher Eccleston: No official regeneration exists. The Eighth Doctor’s reason for regenerating is unknown.
Christopher Eccleston – David Tennant: The Parting Of The Ways (2005)
The Ninth Doctor dies of cellular degeneration caused by absorbing the energies of the Time Vortex.
