Donna Noble

Donna Noble is a fictional character in the Doctor Who universe. The character first appeared in the 2006 Christmas special called The Runaway Bride, but she was brought back as the main season 4 companion. The character is played by the British comedienne Catherine Tate.

Although Donna had all memory of The Doctor erased at the end of series 4, it has been confirmed by both David Tennant and Catherine Tate that she will return for Tennant's final two episodes as The Doctor.