Will is able to use the Taurons' maser device to transport himself back to Earth. However, nobody in Hatfield Four Corners, Vermont will believe that he is one of the Robinsons, or that they are shipwrecked.
The Tauron maser device was not shown in the previous episode, featuring the Tauron family. It was reused as the RNS Seaview's Nuclear Reactor in the television series Voyage to the Bottom of the Sea. It was also seen as the upper part of Galaxies Elecrostatic fragmatiser device in the movie Our Man Flint.