3-2-1 Contact is an American science educational television show produced by the Children's Television Workshop (CTW, now known as Sesame Workshop). It aired on PBS from 1980 to 1988 and later ran on Noggin (a joint venture between the CTW and Nickelodeon) from 1999 to 2003. The show teaches scientific principles and their applications. Edward G. Atkins, who was responsible for much of the scientific content of the show, felt that the TV program would not replace a classroom but would encourage viewers to ask questions about the scientific purpose of things.