There wasn't any major doubt before, but now we know exactly why Lori Loughlin will reprise her role as Debbie Wilson on 90210 Season 5.

In the first photo from the upcoming October 8 premiere (courtesy of TV Line), we see a concerned Debbie sitting alongside a distraught Annie in the hospital. Both are there, of course, due to Dixon's car accident and subsequent injuries suffered on the May finale.

Loughlin is only booked for this single episode, though 90210 has announced a number of other guest-starring gigs.

Denise Richards and Carmen Electra, for example, will both appear on the show's 100th episode. It airs on November 26.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.