Shenae Grimes on '90210's' exciting 100th episode and returning characters

Don't expect two much trouble when the evil Emily and troubled Jasper return for the epic 100th episode of The CW's "90210." Star Shenae Grimes tells Zap2it that the two characters won't wreak too much havoc when they appear in flashback-type scenes.

"There's nothing really too tease -- they're pretty insignificant in the overall storyline," Grimes tells Zap2it of the characters' returns. It's more of a fun treat for longtime fans of the show.

The 100th episode was pretty exciting to film, though. "It was a really big iconic venue, very Hollywood," Grimes says.

But more important than the spectacle of filming the episode was the satisfaction of reaching such an important milestone. "It was really just exciting for us behind the scenes to have that kind of achievement for the first time."

"90210" airs Monday nights at 8 p.m. on The CW. The 100th episode is scheduled to air later in 2012.