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Exclusive: Glee Exec on Season 4's Big 'Breakup' Episode: 'It's Like Titanic - Not All Will Make It'

Glee‘s super couples are heading into Season 4 on a collision course with the mother of all icebergs.

In an exclusive interview with TVLine, executive producer Brad Falchuk is shedding ominous new light on this season’s much-buzzed-about fourth episode, “The Break-Up.”

“All of the core relationships are tested,” he previews of the hour, which fellow EP Ryan Murphy first hinted about on Twitter last week. “I’m not going to say who breaks up and who doesn’t, but they all — Santana/Brittany, Kurt/Blaine, Will/Emma, Rachel/Finn — get kicked in the nuts. And it’s all about how do they recover — and can they recover? And some don’t. Absolutely some don’t. Of those couples, not all of them are going to make it. It’s like Titanic.”

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Of those duos, Rachel/Finn — who already essentially split in the finale — and Kurt/Blaine appear to be the most vulnerable. Regarding the latter duo, Falchuk conceded that Kurt’s decision to follow Rachel to New York while Blaine enters his senior year at McKinley will test their romance like never before.

“Long-distance relationships are hard,” he acknowledged. “They’re not impossible, but they’re really hard. And with all the couples we’re really trying to look at what it takes to have a relationship when one person leaves. It’s particularly hard when somebody graduates high school and someone is still in high school. The second you graduate high school you’re in a different world. You see things differently, your needs are different, your perspective on things is different. So I think it’s a pretty tough challenge.”

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Figuring out who these characters are outside of their respective romances is a major theme of Season 4, notes Falchuk. “Relationships in general will be less of a focus this year,” he says. “I personally think a lot of these characters are more interesting not in relationships. And I think with a lot of them we will be exploring that. Whether they break up or not, we’re really focused on giving them more individual stories.”