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A fan asked Marlene, "Can you tell us if there's a plane involved in 223?" and Marlene said, "Yes," without providing any more info.
Is this bad news? At this point, this first thing that jumps to mind when we hear "plane" associated with Pretty Little Liars is Ezra (Ian Harding) potently flying off to New Orleans, and some fans are clearly worried about Marlene's tweet. However, that's not the only thing it could mean. It could be related to where Toby (Keegan Allen) has been all this time, or maybe it's about Caleb (Tyler Blackburn) and his family in California.
Or maybe it's something else entirely. With this show, you never know.
Be sure to tune in for the next episode of Pretty Little Liars tonight on Monday, February 27 at 8 p.m. ET/PT on ABC Family.