Usually the Gossip Girl gang try to destroy each other with a cutting word here, a leaked secret there, and perhaps a judicious roofying as needed. However, as we barrel toward the season finale, things start to get physical. A surprising alliance, an ill-advised sex request, and a kidnapping in process are among our most shocking moments from Season 4, Episode 21, "Shattered Bass."

Credit: Giovanni Rufino/The CW ©2011 Warner Brothers. All Rights Reserved. Photo: Jack Is Back in Gossip Girl Season 4, Episode 21: “Shattered Bass”

5. Charlie (Kaylee DeFer) in Serena’s (Blake Lively) dress
Hoo boy. Why is it that every blonde on this show develops a need to dress up as S? Charlie should dye her hair red. That would inoculate her against this plague.

4. Charlie wants to be called “Serena” during sex
Then again, she may be too far gone for hair therapy. This crazy train has definitely left the station.

3. Chuck (Ed Westwick) is in cahoots with Jack (Desmond Harrington)
Wow, look who’s making a deal with the devil! (We’re not sure who’s the devil in this scenario.)

2. Thorpe (Michael Boatman) is the real killer
Assuming Avery is really dead, of course. You can never assume anything on Gossip Girl. Maybe Avery Thorpe is really Eleanor. Or a sister for Blair! Who’s slept with Chuck! That would end in more bloodshed than the entire Thorpe-Bass saga to date.

1. Thorpe traps Blair (Leighton Meester) on the roof
First Jack, now Russell. You know what’s gross? How everyone keeps trying to hurt Blair to get to Chuck. Girl needs to take some karate lessons or something.

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Don’t miss our other killer coverage of “Shattered Bass”: