Doctor Who: The Eight Doctors
The Eighth Doctor, who is recovering from the stress of his recent regeneration, stumbles into a final trap that the Master, his arch-enemy, has devised. When the confused Doctor comes to, he glances in a mirror and recognises a stranger's face. He is solely aware of his title as "Doctor" and nothing else. But something inside tells him to have faith in the TARDIS, and his hands naturally travel to the controls.