 Martin gets a splinter of invisflex in his finger, so that everything he touches becomes invisible. What s worse, in the process, Martin loses his dime-shaped Martian Identity Disk, his so called "dog tag" on which contains all his personal information. The disk, when in trouble, sends out a verbal distress signal. Mrs. Brown stops by with some of her world famous brownies when she notices that some of Tim s furniture is "missing"; rather than say they re invisible, Tim tells her that they were stolen, which prompts her to call in Det. Brennan. As soon as Det. Brennan arrives on the scene, all the furniture reappears in the yard. During the investigation, he picks up Martin s coat in the pocket of which is his ID Disk. The detective takes the coat and the disk to the police station for his investigation. Upon its return to Martin, the coat is without the ID disk, which the detective took and inserts into a vending machine. Martin has to get it out of the machine before it starts sending out its "mysterious voice" distress signal. Martin manages to get it out of the machine, however in front of Det. Brennan. Martin s invisiflexed finger aids in hiding it from the good detective.