What episode does Sarah Jane smith meet the eleventh doctor?

Sarah Jane Smith meets the Eleventh Doctor in the "Doctor Who" episode titled "The Sarah Jane Adventures: Death of the Doctor," which is the first episode of the fourth series of her spin-off show. This episode originally aired on October 15, 2010. In it, the Eleventh Doctor, played by Matt Smith, teams up with Sarah Jane and her companions to confront a dangerous alien threat.