The fourth season of the American television series Warehouse 13 premiered on July 23, 2012, on Syfy. The season consists of 20 episodes, and aired on Mondays; the first ten episodes aired at 9 pm, but the series moved to a 10 pm timeslot starting with the eleventh episode. The show stars Eddie McClintock, Joanne Kelly, Saul Rubinek, Allison Scagliotti, Genelle Williams and Aaron Ashmore.
Cast
Main
Eddie McClintock as Pete Lattimer
Joanne Kelly as Myka Bering
Saul Rubinek as Artie Nielsen
Allison Scagliotti as Claudia Donovan
Genelle Williams as Leena
Aaron Ashmore as Steve Jinks
Special guest
Anthony Michael Hall as Walter Sykes
Brent Spiner as Brother Adrian
James Marsters as Bennett Sutton / The Count of St. Germain
Polly Walker as Charlotte Dupres
Anthony Stewart Head as Paracelsus
Joel Grey as Monty the Magnificent
Recurring
C. C. H. Pounder as Mrs. Irene Frederic
Roger Rees as James MacPherson
Jaime Murray as Helena G. Wells
Kate Mulgrew as Jane Lattimer
Sasha Roiz as Marcus Diamond
Faran Tahir as Adwin Kosan
Kelly Hu as Abigail Cho
Josh Blaylock as Nick Powell
Guest
Special appearance by
Cherie Currie as herself
Production
On August 11, 2011, it was announced that Warehouse 13 was renewed for a fourth season of thirteen episodes to air in 2012. On January 13, 2012, Syfy extended the order by seven episodes, bringing the total to twenty episodes. On May 15, 2012, Allison Scagliotti announced on Twitter that Season 4 will debut on July 23, 2012. Brent Spiner and Sam Huntington are set to join season four as guest stars, with Spiner to play Brother Adrian, leader of an intensely secretive sect; and Huntington as Ethan, a jazz musician. Aaron Ashmore was upgraded to a series regular in episode three "Personal Effects". For the second half of the season, Polly Walker will appear in several episodes as Charlotte Dupres. In April 2013, it was announced that Anthony Head had been cast as a villain named Paracelsus, and would appear in the final three episodes of the fourth season.