"The Sarah Jane Adventures" is a CBBC spin-off of long-running science fiction drama "Doctor Who". It focuses on the adventures of Sarah Jane Smith (Elisabeth Sladen), an investigative journalist and former companion of the Time Lord. The Sarah Jane character, played by Sladen, originally appeared in "Doctor Who" from 1973 to 1976 alongside Jon Pertwee and later Tom Baker. "The Sarah Jane Adventures" premiered on BBC One with an hour-long special in 2007 and returned for its first series later the same year. Sarah Jane has her own sonic screwdriver, disguised as a lipstick, and a watch capable of identifying alien species and their home planets. She is joined in her quests by a number of young companions, including teenagers Maria (Yasmin Paige), Luke (Tommy Knight) and Clyde (Daniel Anthony). The fifth and final series aired on CBBC in October 2011, six months after Sladen's death.