They also added The Berenstain Bears to the PBS Retro lineup. I am thinking it is the 2003 series.
I'd much rather the 1985 series more, although the 1985 series was never reran on PBS. I feel as if the 1985 series should have been reran in Canada on Treehouse, since Treehouse did air Paddington Bear, and both those shows were Hanna-Barbera produced. I do know the Canadian channel Showcase did air The Berenstain Bears 1985 series in the 1990s.
I highly doubt they'll air The Puzzle Place as one episode did feature a Where in the World is Carmen Sandiego? crossover with Greg Lee and the late Lynne Thigpen. But maybe PBS Retro could air the Carmen Sandiego series in the future - though some episodes could be skipped - such as "The Taking of the Towers" with the culprits stealing the World Trade Center, which are long defunct and would be irrelevant now.