Many Pretty Little Liars fans consider Mike and Dr. Sullivan to be useless. In fact, we debated in this week's Round Table just which of these characters was more useless.

On this Tuesday's "I Must Confess," though, Aria's brother and the girls' therapist look like they might actually play key storyline roles.

First, get a load of how Mike reacts when his mother tries to snap him out of his funk. You do not mess with this young man's computer, apparently! Next... will the Liars finally tell someone about A? Will Sullivan be that someone?

Check out the following three clips for peeks at these scenes, along with the return of someone close to Hanna.

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