In the final part of the "Doctor Who" special "The End of Time" (2010), Luke is nearly hit by a car while crossing the road and talking on his mobile phone; he is saved by the Doctor prior to his pending regeneration. The Doctor then waves to Sarah Jane and Luke before stepping into his TARDIS and disappearing. At the beginning of "The Sarah Jane Adventures" Series 4 (2010), Luke is written out during the episode "The Nightmare Man" as the character departs to attend the University of Oxford after having taken his A Levels ahead of schedule, although makes regular cameo appearances episode-to-episode in communicating with his friends and mother via webcam. In the series finale, "Goodbye, Sarah Jane Smith", Luke makes a full appearance in part two. He drives down from Oxford to assist Rani and Clyde against nefarious alien Ruby White (Julie Graham), who has his mother held captive. He puts his intelligence to good use, and with some long-distance assistance from K-9 (who is based in Oxford), he defeats Ruby and saves his mother. He also appears in the Series 5 opener, "Sky" (2011), on a web cam, his clothes subsequently being leant to Sky Smith (Sinead Michael), another genetically-engineered child who becomes Luke's adopted sister at the episode's conclusion. He makes a final appearance in the series finale, "The Man Who Never Was". When Luke visits from Oxford, he and Sky finally meet one another in person and bond for the first time.