documentary “Quiet on Set: The Dark Side of Kids TV.”The five-part eye-opening doc focuses on Nickelodeon producer Dan Schneider and features a behind-the-scenes look at his inappropriate behavior with child stars such as Alexa Nikolas, Drake Bell and more in the late ’90s and early 2000s.The “Saturday Night Live” comedian, 45, who starred on the network’s “All That” and “Kenan & Kel,” opened up about the allegations and Schneider, 45, on the Tamron Hall Show.“It’s tough. It’s a tough subject, you know?” Thompson said on Wednesday.