A spy kidnaps Tim O'Hara(Bill Bixby) and trys to get secret information from him. While trying to locate Tim, Uncle Martin(Ray Walston) walks into a trap. A metal cage and a hole in the wall where two thin pipes stick out. The spy says that in 10 minutes two gases will come out of the pipes and with one whiff, instant death. The spy returns to check on Tim and while he's gone, Uncle Martin raises the cage and stretches the pipes into the hall. As the spy returns, the gas is released into the face of the spy. All that happens and the spy just coughs. Apparently, the gas isn't deadly after all.