Clips

The return of Sarah Jane
The return of Sarah Jane and K-9! The Doctor plus companions old and new fight the bat-like Krillitanes! Sarah Jane snoops around the school and is shocked to find the TARDIS. Her and the Doctor have an emotional but restrained reunion. They regroup with Mickey and Rose, and Rose quickly begins competing with Sarah Jane for the Doctor's attention. Mickey sums up the situation perfectly.

The God Maker
The Doctor, Rose and Sarah Jane discover that the computers — bolstered by the students' enhanced intelligence — are part of a Krillitane effort to solve the "Skasis Paradigm", a theory of everything. Evil headmaster Mr. Finch propositions the Doctor, tempting him with the ability to save the Time Lords and override human mortality. With Sarah Jane's counseling, the Doctor refuses.

The return of Sarah Jane
Sarah Jane Smith returns to Doctor Who after 27 years away from him. She's also on hand to explain the intricacies of the Doctor and his long list of female companions in this behind the scenes clip from BBC Worldwide.