If you’re on the fence about a new TV series, it only seems fair to abide by the three-episode rule. Pilots are notoriously unreliable as quality barometers. Second episodes can be even trickier; they’re generally filmed long after those initial episodes have wrapped, and they’re tasked both with delivering additional exposition and giving a general roadmap for where a series is going.
By the time a show’s third episode airs, though, there should be enough evidence to judge whether it’s worth sticking with. At this point, main plot arcs, major characters’ personalities, and a series’ general tone should all be pretty well established. If they’re clicking, you may as well go ahead and get invested; if they’re not, it could be time to jump ship and free up some DVR space.
All of which is a long-winded way of saying that Once Upon a Time in Wonderland doesn’t exactly pass the three-episode test. Much like its network-mate S.H.I.E.L.D., Wonderland isn’t a bad show, per se — but it’s also not great, or at least not as engaging as its parent show Once Upon a Time.