Kelly doesn't return to 90210 under the best of circumstances during the episode "Off the Rails." Her half-sister is in serious trouble.
Added:
Debbie and Harry learn about Silver's recent behavior during the episode "Off the Rails." They help lead the search party for Dixon's troubled girlfriend.
Added:
Ethan and Annie are broken up. But in "Off the Rails," they join the search for Silver.
Added:
Adrianna and Navid appear to be 90210's healthiest couple. And that's saying a lot, considering her state.
Added:
Navid and Adrianna take care of Kelly's son on this episode, and actually do a great job. Could they become successful parents?
Added:
Welcome back, Kelly. Sorry you need to return under sure dire circumstances for your sister.
Added:

90210 Season 1 Episode 18 Quotes

Debbie: You had sex?
Harry: You made a movie of it?

He's the one person that I love the most, and I don't know who he is. I don't understand.

Silver