Eddie McClintock and Joanne Kelly

Favorite sci-fi actors from Star Trek and Caprica will amp up the mystery and excitement on the third season of Syfy's Warehouse 13, returning with new episodes July 11. Star Trek Voyager's Jeri "Seven of Nine" Ryan debuts as a bride named Amanda on Aug. 1, while Kate "Captain Janeway" Mulgrew begins her four-episode run as Warehouse protector Jane in September. Both characters share a shocking connection to a series regular.

"I was an original Star Trek fan and loved the movies," says executive producer Jack Kenny. "I remember loving when they cast a female captain of the Enterprise and have found her work incredibly deep, thoughtful and compelling to watch. I'm thrilled to have her play a character who will play such an important overall role in our series."

How important? Kenny's not ready to reveal her big secret just yet, only that she first appears in Episode 8 and "she's a regent who has a past with one of our characters. We'll learn how her past is influencing the Warehouse's present. This season, more than any other season, is about how our past influences our present."

Along those same lines comes Ryan, whose character, Amanda, will be getting married in the new season's fourth episode. "Amanda is a major in the Marines who also has a past with someone in the Warehouse," says the producer.

Also look for Star Trek: Deep Space Nine's Rene Auberjonois to reprise his role from last season as computer expert Hugo Miller. "We discover a little bit more about his past, too," Kenny says. He'll appear in the third episode alongside former Bionic Woman Lindsay Wagner, who is back as Dr. Vanessa Calder. "Vanessa, Hugo, Artie and Claudia go off looking for an artifact while Pete and Myka are off on a B story," Kenny says.

Fans of Caprica can also look forward to two significant arrivals. Sasha Roiz, who played Sam Adama, and Alessandra Torresani, who played Zoe Graystone, will be coming on to Warehouse to cause trouble. "Sasha is a mysterious part of our Big Bad for the year," says Kenny. "His character is Marcus Diamond and first shows up in Episode 3. Alessandra guest stars as a girl in trouble in our ninth episode who needs Myka and Claudia's help."

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