Summer Glau, Garret Dillahunt and Rebecca Mader will appear in upcoming episodes during the freshman season.

Syfy's freshman series Alphas is ramping up its guest stars for the next several episodes.

Summer Glau (Terminator: The Sarah Connor Chronicles), Garret Dillahunt (Raising Hope), Rebecca Mader (Lost), Alaina Huffman (Stargate Universe), Brent Spiner (Star Trek: The Next Generation), Lindsay Wagner (The Bionic Woman) and Peter Wingfield (Caprica) are all set to appear on the Monday night drama.

Wagner will reprise her role as Dr. Vanessa Calder from Warehouse 13 on the episode airing Aug. 15 at 10 p.m., "Never Let Me Go," while Huffman and Wingfield will guest star a week prior in "Bill and Gary's Excellent Adventure."

Glau appears in "Catch and Release," set to air Aug. 22 and Dillahunt will make an appearance in "A Short Time in Paradise," airing Aug. 29. Spiner and Mader will appear in "Blind Spot," to air Sept. 12.

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