'Dexter' Twist: Professor Gellar's as Cold as Ice (VIDEO)

There was a major twist on the most recent episode of 'Dexter,' so major that Showtime declined to put the episode in its online press screening room, where I've been watching and recapping the show from all season. So I must confess that I haven't yet seen 'Get Gellar,' but we do have a video clip from the episode, and we'd be be remiss if we didn't give 'Dexter' fans the opportunity to dissect the dramatic reveal.

Read on to check out the video, and for a few thoughts on why, in retrospect, we probably should have seen this coming.

In the clip, Dexter returns to the Doomsday Killer's abandoned church lair, where he finds Travis, whom he'd been working with to find Gellar, passed out on the floor. Dexter proceeds down a flight of a stairs and finds a meat-locker holding Professor Gellar's frozen dead body. Yes, Gellar's been dead this entire time! It's been Travis, the innocent-looking accomplice we mistakenly believed had a conscience, who's been heinously killing and dismembering these victims, including his own sister.

Last week, in the comment section of AOL TV's recap, a commenter named Malik raised the theory that Professor Gellar might be a figment of Travis' demented imagination, and it sparked an interesting discussion. Looking back, there were several clues along the way. Let's start with the scene where Travis and the Professor ran down those two people with a car, with Gellar pushing Travis' leg against the gas pedal. It seemed, well, ridiculously unrealistic ... but realism isn't exactly a calling card of 'Dexter,' so you could be forgiven for not realizing it then.

There was also the Professor's propensity for popping up unexpectedly, usually before something terrible was about to happen. There was Dexter wondering if the Professor was Travis' personal version of a 'dark passenger.' But as many have pointed out now, it's pretty clear in hindsight that we never really saw other people talking to Gellar, or saw Gellar killing any of DDK's victims. So maybe the writing was on the wall ... but I didn't see it until Malik connected the dots last week.

Leave your thoughts on the episode in the comments. Meanwhile, I'm going to visit a friend who gets Showtime...