Here's something we already know: Adrianne Palicki isn't returning to Friday Night Lights full-time, with her being slated for a multi-episode arc this season that is supposed to draw out her farewell. A given, since Minka Kelly and Zach Gilford are also booked for similar farewell arcs as they move past high school and things change for Dillon.
Here's something that could happen: Adrianne Palicki might not be able to return to Friday Night Lights at all.
Well, the girl that plays Tyra isn't so sure either, but she's pointing towards a schedule conflict. "I'm actually going to be shooting [Red Dawn] during the fourth season, so I don't know if I'm going back," she told Entertainment Weekly's Michael Ausiello. Red Dawn, in this case, is a remake of the 1984 war film, which puts her in the company of Chris Hemsworth and Josh Peck.
"I know they want me to [return]," she added. "[The thought of leaving FNL makes me] very sad. I had such a great time on that show. They're like my family."
So suddenly I'm playing with the idea of either her farewell arc happening at the later part of season 4, which would be a little weird because they'll have to account for a Tyra-less first part of the season, or the return happening on the fifth season. Which has the same implications, if you think about it. Whichever case, it's a way of getting used to it...