A holiday marathon of Twilight Zone episodes always is a great way to spend the day, and today is loaded with a ridiculously generous sampling of classics. Start with The After Hours (8:30 a.m. ET, pictured), with Anne Francis in a department store. Before long, there’s Number 12 Looks Just Like You (1 p.m. ET), with Suzy Parker and Pam Austin.  At 7 p.m. ET, it’s The Eye of the Beholder. At 8 p.m. ET, The Monsters Are Due on Maple Street, which I show to students in my TV History & Appreciation classes. At 9:30 p.m. ET, the wonderful To Serve Man, with the perfect Twilight Zone twist ending. Oh, what’s the point? Just watch. There’s greatness everywhere. And, of course, Rod Serling hosts throughout.