A TikTok personality has been tapped to host the revival of a beloved TV show. New episodes of “Reading Rainbow,” which aired on PBS from 1983-2006, are coming soon. TikTok star Mychal Threets will take over as host for the “Reading Rainbow” revival. “I am so happy for all of us that Reading Rainbow is returning! YOU all did this!”New episodes of “Reading Rainbow” will premiere at 10 a.m.