 Mrs. Brown s brother, Alvin, has another hair-brained, get rich scheme. His new fangled machine, Wannamaker s Widdle Wife Saver, is a housewife s answer to chores - it cleans, it vacuums, it mows lawns among other things. Or so it s supposed to once Martin puts it together. It s a piece of junk that even Martin can t salvage. Martin and Tim decide to try and sell it back to the man from who Alvin bought it, only because Alvin used Loralei s $500 to buy it. Dr. Dunlap ends up being a bigger swindler than Alvin is but pretends not to be, but Martin and Tim convince Dunlap that the machine is a goldmine. They also almost convince Alvin that it really is a piece of junk and he should get the money back. That is until Alvin and Loralei see Martin do some Martian trickery with the machine. Martin goofed big time. So Martin and Tim, pretend to want to act as backers for the machine with Dunlap, but also go incognito as executives of a large electronics firm backing Alvin and the machine in an effort to sell it back to Dunlap without, as Martin and Tim, really wanting to invest as Dunlap s potential backers.