William Shatner on his amazing “trek’ into space and his message to Prince William after his space travel slam. Heather Locklear on her Hollywood return. Our night out with Jay Z and Beyonce. ET Throwback Thursday with lifelong friends Ben Affleck and Matt Damon. Shania Twain, Gabby Barrett, Micky Guyton, We’re with country music’s biggest stars at the “CMT Artists of the Year” Awards. Kate Walsh and Scott Speedman drop exclusive details about their “Grey’s Anatomy” return. Guest co-host Malin Akerman joins Nischelle Turner and Kevin Frazier on the ET stage.