The beloved children’s show characters will return in special called “H.R. Pufnstuf Comes to Mutt & Stuff!” Nickelodeon is bringing “H.R. Pufnstuf” back for a new televised adventure for the first time in 45 years. The network announced on Tuesday that it has greenlit “H.R. Pufnstuf Comes to Mutt & Stuff!” The special will be part of the network’s order for 20 additional episodes of live-action preschool series “Mutt & Stuff” from Sid and Marty Krofft, the creators of “Pufnstuf.” The beloved character that debuted on NBC in 1969 will return to TV in early 2016, along with friends Cling...