Got your DVR ready, 90210 viewers?

You'll want to save this season's 19th episode permanently.

According to Michael Ausiello, this installment airs in April and will be must-see-worthy for two reasons: It marks Tori Spelling's return as Donna - and features the arrival of Dixon's estranged mother!

Will Dixon be smiling when his mother returns to town?

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