Crossland, along with Gascoigne, was a Detective Inspector assigned to investigate the disappearance of Samantha Briggs' brother, Brian, in 1966. After Gascoigne disappeared in the Chameleon Tours hangar, the Second Doctor helped Crossland learn of the two cases' connection and he and the Doctor began to investigate Chameleon Tours.
He later boarded a Chameleon Tours flight in an attempt to investigate but was abducted by Blade and taken to the Chameleons' space station and his identity taken over by the Chameleons' Director.
When the Doctor defeated the Chameleons, the Director was killed and the real Crossland was subsequently freed and returned to Earth. (TV: The Faceless Ones)