There will be "serious consequences" that "come to a head" because of decisions Oliver Queen made in tonight's episode of Arrow, according to executive producer Wendy Mericle.
For those who aren't up to speed yet, the Season Two (to the viewer) revelation that Oliver has a child finally paid off in a big way: he met Samantha Clayton, whose son, William, is Oliver's.
He's no Connor Hawke -- who is being cast for DC's Legends of Tomorrow -- but William will be a part of Arrow going forward...even though Felicity doesn't know about him yet.
"It's definitely going to come to a head in the middle of the season," Mericle told reporters during a screening this week. "I can't tell you exactly how that's going to happen. But...obviously for the arc of Oliver and Felicity's relationship this season, the fact that he's keeping this from her—true to what we've done on the show, if there's a secret somewhere, it's going to come out and it's going to have some serious consequences."
"We're really excited about how that's going to change things and it's really going to raise the stakes and throw some wrenches into the works of their relationship — which so far this season has been pretty smooth sailing," Mericle added. "True to form, we're going to really mine that. There'll be some fallout for both of them."
Arrow's midseason finale will be next Wednesday at 8 p.m. ET/PT on The CW.