Spiner, who will join the show during the season 4 premiere on July 23, will play Brother Adrian, the leader of a top-secret sect called the Brotherhood of the Knights of the Black Diamond.

Warehouse 13 stars Eddie McClintock, Joanne Kelly, Saul Rubinek, Genelle Williams, and Allison Scagliotti.

Spiner's stage credits include Life (x) 3, 1776, and Sunday in the Park With George. He is best known for his 15-year run as Lieutenant Commander Data on the television series Star Trek: The Next Generation and its four subsequent spin-off films.