Pankow, 26, tells PEOPLE what fans can expect from JJ after that major bombshell in the final episode of season 4 part 1

So when filming for the second half of Season Four moved to the western coast of Morocco, Rudy Pankow, who plays the daredevil JJ, seized the opportunity for a quick jaunt to the Sahara desert. Awed by the sand dunes that resembled snowy hilltops and the sun setting behind undulating mounds that stretched for miles,