Credit: FOX ©2011 Fox Broadcasting Co.

The Warblers were back in tonight’s Glee Season 4, Episode 11: “Sadie Hawkins,”  but one familiar face was noticeably missing. What the heck happened to Sebastian (Grant Gustin)?

Look, we love Jeff (Riker Lynch), Nick (Curt Mega), Trent (Dominic Barnes) and the rest of the gang. And new guy Hunter (Nolan Gerard Funk) is a’ight. But there’s just something about Sebastian and all his smooth charm. What can we say? We miss him.

Unfortunately for Sebastian fans — but not so much for fans of Grant — the actor wasn’t able to be in this Glee episode because he was busy filming scenes for a different TV show.

Grant has a multi-episode role on The CW’s 90210, where he’ll play a wealthy and charming college student named Campbell, and his first episode is airing as soon as February 4.

So remember when Kurt (Chris Colfer) accused Sebastian of having “obnoxious CW hair”? Now he actually does.

We’ll miss you, Sebastian. Even if you do smell like Craigslist. Now, if you’ll excuse us. We have to go set up a new DVR recording in February.

Source: Grant Gustin on Twitter