Bryan Cranston and Aaron Paul are returning to the Breaking Bad universe in Better Call Saul this season, reprising their roles as Walter White and Jesse Pinkman. This was confirmed all the way back in April, but according to Paul, their involvement in the show was supposed to be a surprise.

Speaking to the Albuquerque Journal, Paul and Cranston spoke about the extreme lengths that AMC went to in an effort to keep their involvement in the show a secret.

“We were asked to keep it a secret forever,” Cranston said. “We were flown in under the darkness of night. We took this plane and they went to a certain private section of the airport there. And then we took like two steps out of the tarmac and into an SUV. They move us to an Airbnb–a duplex. He had the top floor. I had the bottom floor and we were told you can’t leave.”