Another LGBT TV first is on the way!

Multiple sources connected to a fan-favorite, high-profile TV show tell me that one of the female characters will start transitioning into a man in an upcoming episode arc.

This beloved character has been a part of the show for a few seasons, having dated men in the past, and the storyline will be "very emotional," and probably take fans by surprise, but will be handled delicately and respectfully, per insiders.

This will be the first female-to-male transition storyline on a mainstream TV show, and comes on the heels, of course of Orange Is the New Black's successful Laverne Cox casting (the first transgender actor to be nominated for an Emmy), and Amazon's new trangender series, Transparent, starring Jeffrey Tambor, which already has been picked up for a second season and has received rave reviews.

Now, we don't want to outright spoil this plot twist—what fun is that?—but we will give you 15 shows below that are possible contenders. And for every 100 new "Likes" of this Facebook page, we will knock one show out of the running...