When does 3-2-1 Contact return?

3-2-1 Contact is an American science educational television show. It aired on PBS from 1980 to 1988 and later ran on Noggin (a joint venture between CTW and Nickelodeon) from 1999 to 2003. The show was based on the original concept of The Curiosity Show, an Australian science-based children's educational TV show that had been running since 1972.