Brendan Richards

Brendan Richards was the ward of Lavinia Smith. He first met Sarah Jane Smith during a school break in December 1981. Shortly afterwards, he was kidnapped and nearly sacrificed by the Hecate Cult in Moreton Harwood but was saved by Sarah Jane and K9 (KAC: A Girl's Best Friend)

His computer skills eventually led to him getting a job in the Silicon Valley region of San Francisco. He was unable to attend Lavinia's funeral as a result of his work in California (BFSJS: Comeback)

It is unknown if Brendan ever kept in touch with his adopted uncle, Africana, and his adopted cousin, Sarah Jane. It is also unknown if he ever met Luke, Rani and Clyde, as they make no reference to him. It is likely that he met Luke at least once, if not more, as Sarah Jane did work (albiet unwillingly) with Brendan the first time that she met him, so, it is likely that he visited her from San Francisco at least once.