Strange equipment has been making its way to the lab and fueled with the curiosity that makes good scientists, our boys take the packages that have been arriving from the Acme Space Depot and their handy dandy Allen key and before you know it they have themselves an interocitor.
Regrettable remark #1: When assistant Joe Wilson (Robert Nichols) mentions his wife wishes they would come up with some housekeeping devices, Cal responds that she’d only pack on the pounds if she didn’t have to work. Golly!
There are other scientists at the compound. Girly-girl scientist Dr. Ruth Adams (Faith Domergue) and professorly type Steve Carlson (Russell Johnson) among them. Wouldn’t you know that Cal and Ruth have a past? The present and future isn’t looking too bright. Their fellow scientists seem to be under some sort of mind control, and our intrepid trio is getting a little fed up with the whole deal. The audience is let in on things in a conversation between Exeter and the Monitor (Douglas Spencer) of Metaluna. The home planet’s defences have been depleted and no matter the stage of the research being done on Earth, it is time for Exeter's return.
Cal and Ruth attempt to fly away from the destructive scene, but instead are pulled up into the spacecraft and on their way to the doomed planet.
On board the ship we are treated to regrettable remark #2 when Exeter asks Ruth if “as a woman” she isn’t curious about Metaluna. Geez!