Arrow, Vampire Diaries, and X-Men favorite Kelly Hu also guest stars in the episode, which is called “The Sky’s The Limit.”
Here’s the press release from Syfy with details:
NEW YORK – May 14, 2013 – Abracadabra! Oscar and Tony Award-winning legendary actor Joel Grey (Cabaret) conjures up mayhem on Syfy‘s Warehouse 13 when he guest stars on the Monday, May 20 episode, premiering at 10PM (ET/PT).
In “The Sky’s the Limit,” Grey plays Las Vegas lounge act magician Monty the Magnificent, who’s worked the strip for decades. When his casino employers think Monty’s act is getting stale, Monty enlists the help of a powerful artifact that turn his parlor tricks into wondrous, but deadly feats.
Also guest starring in the May 20 episode are Steve Valentine (Crossing Jordan) as Val Preston, a headliner who’s in desperate need of something new to spice up his own act, and Kelly Hu (X-Men), who plays Abigail Cho, a protégé of Mrs. Frederic (CCH Pounder).
Warehouse 13 follows a team of government agents who work at a massive, top-secret storage facility in windswept South Dakota, which houses every strange artifact, mysterious relic, fantastical object and preternatural souvenir ever collected by the U.S. government. The Warehouse’s caretaker Artie Nielsen (Saul Rubinek) charges Pete Lattimer (Eddie McClintock), Myka Bering (Joanne Kelly), Claudia Donovan (Allison Scagliotti) and Steve Jinks (Aaron Ashmore) with chasing down reports of supernatural and paranormal activity in search of new objects to cache at the Warehouse, as well as helping him control the Warehouse itself.
Here are some pics:
