My Favorite Martian 0327 Our Notorious Landlady

While dusting Martin's personality altercator, Mrs. Brown accidentally activates it and gets turned into a thief. Martin makes an antidote, but it will take some time before it's ready to use. Meanwhile, Lorelei shoplifts some small items which Martin and Tim plan to take back. Det. Brennan comes by and mentions that he will be providing security for the Slotkin Diamond. Martin and Tim know that Lorelei will want to steal it. However, someone else actually steals the diamond. Brennan suspects that Martin stole it. He would like Mrs. Brown to try and find out where he's hidden the diamond. Lorelei overhears that Martin figures out that the real thief is the security guard hired to transport the diamond, Jack Plummer (Hal Baylor). Martin and Tim have to beat Mrs. Brown to Jack and the diamond. Martin then manages to have Brennan catch Plumber with the diamond and give Lorelei the antidote. (Roy Engel as Police Captain. Peter Brocco as Curator.)