These four can't do it alone. Look for numerous guest stars to appear on the new season of Warehouse 13.

Leena, from Warehouse 13, at her bed and breakfast.

Break it down for us, Artie. The man in charge is featured in this photo.

Kate Mulgrew is seen here as a woman named Jane on Warehouse 13. She'll appear on the series for four episodes.

Pete and Myka fight to protect a town under attack from the threat of a box artifacts on Warehouse 13. "Personal Effects" is the third episode of the show's fourth season.

Hugo returns when an artifact puts his nephew's school in danger on Warehouse 13. "There's Always a Downside" is the fourth episode of the show's fourth season.

Pete and Myka investigate a hockey player who exhibits extraordinary healing powers on Warehouse 13. "No Pain, No Gain" is the fifth episode of the show's fourth season.

Artie is shocked when Brother Adrian begins sending deadly artifacts to agent's loved ones on Warehouse 13. "The Ones You Love" is the ninth episode of the show's fourth season.

Artie's obsession leads to dangerous consequences on Warehouse 13. "We All Fall Down" is the tenth episode of the show's fourth season.

James Marsters guest stars as a seemingly unreliable professor that Myka and Pete must work with in order to save the world on the Spring return of Warehouse 13. "The Living and the Dead" is the 11th episode of the show's fourth season.

Artie learns that getting back to work won't be as easy as he'd hoped on Warehouse 13. "Parks and Rehabilitation" is the 12th episode of the show's fourth season.

Myka and Pete head to Vegas to investigate some crimes connected to magic on Warehouse 13. "The Sky's the Limit" is the 14th episode of the show's fourth season.