|First Appearance:||It's Walky! 16 December 2000|
Mr. McHenry was employed as a scientist at the US government's Area 51 facility in the 1960s. After contracting bone cancer due to continuous radiation exposure from his work, he stole a Martian spacecraft as "compensation".
He flew the saucer home with plans to take his wife and son, but drew the attention of the Head Alien, who had designs of his own for the ship. However, Anthony and Linda Mitchell successfully fended off the Head Alien, and ultimately agreed to serve the US government in exchange for the elder McHenry's freedom.