CSIis gearing up for its two-hour finale event and the stars are sharing some behind-the-scenes looks at the action.

Marg Helgenberger tweeted a pic of Willows and Grissom's (William Petersen) reunion, and couldn't resist offering a shot of the group, includingJorja Fox, Eric Szmanda and Paul Guilfoyle.

CSI's finale will air on Sept. 27 on CBS. Are you looking forward to it? How do you hope the show signs off?

(Full disclosure: TVGuide.com is owned by CBS)

TODAY'S VIDEO: Which Bachelorette star has a weirder talent: Shawn or Kaitlyn?