Michael C. Hall as Dexter by Randy Tepper/Showtime Michael C. Hall as Dexter by Randy Tepper/Showtime

Wow. I thought I was the only one who was psyched to see the serial killer's kid sis go on her first date with Special Agent Lundy. But no, apparently not. Sunday's installment of Dexter was the most-watched episode of a Showtime series ever. It drew 1.23 million viewers at 9 pm/ET and a total of 1.63 million when you add in its 11 pm broadcast. It was also up a whopping 41 percent from the previous week. Dag, can you imagine the numbers it's gonna get when Dex is forced to kill his psycho girlfriend Lila? ('Cause you just know he's gonna have to.) - Ben Katner