Inspector Strickland (real name Sip Fel-Fotch Pasameer-Day Slitheen) was a member of the Slitheen family posing as a human police inspector. In his own words, he handled "trouble." Trouble in this case was Rose Tyler and the Doctor. While trying to kill Rose's mother Jackie and Mickey Smith, "Strickland" was doused with vinegar by Mickey who had deduced that the Slitheen's species were calcium-based lifeforms. "Strickland" subsequently exploded.