According to this (unfortunately) German article, "Criminal Minds: Beyond Borders" will get some visits from four former "Supernatural" actors in its upcoming Season 2 (midseason on CBS).


ETA: here's an English one too


So, before you click the link, give me some guesses!
a beautiful interview with our boys (by TVLine), which also gives a bit of an insight into how the show changed them, and into their wonderful "bromance" both on- and off-screen

http://tvline.com/2014/12/17/white-collar-series-finale-spoilers-cliffhanger-ending-movie/
SPOILER WARNING - READING ON YOUR OWN BEHALF:


a little look-out on what's coming next week:

http://www.spoilertv.com/2014/11/white-collar-episode-603-uncontrolled_10.html

and for the final three:

http://www.spoilertv.com/2014/11/white-collar-episode-604-606-synopsis.html


I hope I'm wrong, but judging from those 4 synopses (and what JE said in a recent interview), we will have to bid one of the main characters a farewell for forever...