Dorothy Halligan Deaver, is a recurring character from the sitcom, ALF. She is biologically Kate's mother who frequently bullies ALF. She moves in with the Tanners for a while after she has a falling out with her best friend "Crazy" Estelle, whose house she used to live in. Dorothy moves into an apartment nearby the Tanners, where she meets Whizzer Deaver, who she has married in the episode Something's Wrong With Me.
Dorothy enjoys knitting and horse race betting.
Something's Wrong with Me: Threaten to kill ALF with a gun, if he didn't eat the raw spinach.