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Hot on the heels of the acclaimed third series, Doctor Who returns for a fantastic fourth series with a familiar face alongside the Doctor.
Award-winning comedienne Catherine Tate returns as the Doctor's new companion, revisiting her role as Donna Noble who featured in the 2006 Christmas special The Runaway Bride. Martha Jones - who left the Doctor at the end of Series Three to break the unrequited circle of love she felt for him - will also return. The Sontarans and Ood are set to reappear.