 After chasing him into a warehouse, he is revealed to be a Slitheen working with another family member, in an attempt to use a matter compressor to compress Earth into a diamond, in order to make themselves rich.After Sarah Jane's sonic lipstick fails, she calls K9 who tries to destroy it.Annoyed, the Slitheen grab Rani and hold her hostage, threatening to kill her if K9 continues to destroy their equipment, and Sarah Jane complies.