Of late the Criminal Minds spin-off pilot episode, 'Beyond Borders,' has attracted a lot of buzz. In a recent interview, showrunner Erica Messer spoke about the highly anticipated episode, but also revealed that another episode of season 10 will drive fans "crazy."

Gary Sinise, Anna Gunn Reveal Crucial Details About Spin-Off Episode 

Speaking to TVLine, Messer said that episode 21, which has been written by Breen Frazier, is amazing. "There will be promos that will make the audience crazy," she said.

Messer went on to elaborate what she meant by crazy. "Crazy like, "What is happening on my Criminal Minds this week?!" People are going to lose their minds," she said.

First Look Preview At Criminal Minds Spin-off Pilot Revealed

The showrunner obviously dished a whole lot about Beyond Borders, the pilot for which will air this week, and how it came to be. The spin-off will star Gary Sinise as Jack Garrett and Anna Gunn as Ally Lambert, who ar essentially key members of the BAU's international unit.

Messer weighed in on what lessons they'd learnt and applied for this second attempt at a spin-off, the first one being Criminal Minds: Suspect Behavior starring Forest Whitaker. She responded specifically to a question asking what lessons they'd learned from the first failed attempt with Suspect Behavior.

"In a word, many. The most noticeable one - and it's probably a struggle that every spinoff has - is: How are you the same but different? And what happened last go-around [with Criminal Minds: Suspect Behavior starring Forest Whitaker] was, "Oh, they're different because they're rogue." They don't work at the FBI, they work out of a dojo. And they've got this whole sort of "rogue" mentality about them," she said. "But [for Beyond Borders] I thought, maybe how they're the same but different is that they are good ol' American heroes working out of the FBI and they help Americans who are in trouble - which sounds familiar because that's what the BAU does - except they do it when Americans are outside of our country. And that's what makes it different. I think that's also what makes it timely, because a staggering number of Americans are moving out of the country, whether it's for work or just..."

'Beyond Borders' will air on CBS on April 8. 

Watch the promo for the episode here: