Shannen Doherty's Brenda Walsh had a huge impact / Late-night somberly addresses Trump assassination attempt / Halle Berry exits Kim Kardashian show

PLUS: Richard Simmons and Dr. Ruth are a reminder of the value of "cheerful weirdos."

Shannen Doherty's Beverly Hills 90210 character Brenda Walsh was a complex adolescent — not unlike herself
"In the pantheon of teen characters, there was no one better suited to bring an edge to the j…