The Doctor in SJA

The Doctor appears in episodes five and six of the new series, which will air on October 29 and October 30 on BBC One. The story - titled 'The Wedding Of Sarah Jane Smith', is penned by Gareth Roberts ('The Shakespeare Code', 'The Unicorn and the Wasp') and also guest stars Nigel Havers as Sarah Jane's groom-to-be.The BBC has just released these synopses of the two episodes and the story as a whole:Overall story summary: "Sarah Jane has met Peter Dalton and wants him to become part of her life; to become a father to Luke perhaps. But Clyde thinks Peter is hiding a secret or two of his own, especially when he and Rani find an empty house where Peter says his home should be..."Part one summary: "The Doctor returns on the happiest day of Sarah Jane's life - but a deadly trap is waiting for them all! As the strands of a clever and careful plan draw together, can even a Time Lord save Sarah Jane, on the day of her arch-enemy's greatest triumph?"Part two summary: "The Doctor joins the battle - but is it too late to save both Sarah Jane and the Earth itself? As the power of the Pantheon of Discord grows in strength, the old friends are separated across different time zones, and must fight to save each other - but for one, there's a terrible price to pay."