Jerry Houser (born July 14, 1952) is an American actor. Among his better-known roles are Sci-Fi on G.I. Joe, Principal Milty on As Told by Ginger, and Bamm-Bamm Rubble on The Flintstones. He's also one of the Keebler Elves, and appeared as Dave "Killer" Carlson in Slap Shot. He is also known for his role as Wally Logan; the husband of Marcia Brady in the spin-offs to/specials of the Brady Bunch, and has also been in at least one episode of Darkwing Duck.