The official description for episode 1.19 has been released:

TUESDAY, APRIL 14
“90210″ (9:00-10:00 p.m. ET)
“Okaeri, Donna!” (TV- 14, DL) (HDTV)

TORI SPELLING AND DIABLO CODY (OSCAR-WINNING WRITER OF “JUNO”) GUEST STAR / WEST BEV STUDENTS VOLUNTEER WITH HABITAT FOR HUMANITY Kelly (Jennie Garth) and Silver (Jessica Stroup) are surprised when Donna (guest star Tori Spelling) shows up at their door, straight off a plane from Japan. Annie (Shenae Grimes) and Dixon (Tristan Wilds) decide to spend their spring break on a road trip to visit someone from Dixon’s past, while Ethan (Dustin Milligan) decides to step out of his bubble and volunteer with Habitat for Humanity. Naomi (AnnaLynne McCord) joins the Habitat build after learning that Liam (Matt Lanter) is also attending, but is clearly out of her comfort zone. While Kelly and Donna are dining on sushi, Diablo Cody (guest starring as herself) convinces Donna to design a dress for her for a red carpet event. Stuart Gillard directed the episode written by Jennie Snyder Urman & Rebecca Rand Kirshner Sinclair (#119).