All four Pretty Little Liars will work it on Tuesday night.

Look for the girls to be featured in a fashion show that honors their late friend, but look for the development to also take place for an unexpected reason: Alison's mother comes to town and requests their inclusion at the event.

For what reason? Does she have an agenda? Tune in to "Never Letting Go" to see more and enjoy the following three clips from the episode now.

Never Letting Go Clip - Spencer and Mona

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