Was the end of this week's Pretty Little Liars the beginning of serious trouble for one main character?

On "The Bad Seed," evidence against Ian turned into a major problem for the core four, as the hour concluded with Aria, Spencer, Hanna and Emily being taken away by the police. Interrogation awaits next Monday, and the following previews make it clear that at least one Rosewood High School student might become a prime suspect in Alison's murder.

Thanks to a Canadian promo in addition to the ABC Family video posted here, we actually have more upcoming scenes than usual to offer readers. Sit back and prepare for what's ahead now...

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