TV Guide is reporting that Brent Spiner will be the new "big bad" when
Warehouse 13 kicks off it's 4th season July 23rd.
Star Trek: TNG actor will be playing Brother Adrian, leader of a top-secret sect known as the Brotherhood of the Knights of the Black Diamond.
"Artie Nielsen [Saul Rubinek] and the gang are on a mission to pull their lives back together and Brother Adrian is a major obstacle to that," says executive producer Jack Kenny. "The Brotherhood is descended from the Knights Templar and connected to the Vatican. It is charged with the protection of many powerful artifacts, one of which Artie desperately needs to make everything right again."
Spiner will appear in at least six episodes for the upcoming season.

TNG fans will remind you that this will be the 2nd time Spiner and Rubinek have appeared together and been adversaries. Rubinek played a "collector" who kidnaps Data to add to his collections of rare items in the episode "The Most Toys".