Siler

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Sylvester "Sly" Siler
Stargate character
Image:Sgt. Siler in 'Evolution Part II'.jpeg Sgt. Siler in Evolution Part II
Race	Human
Gender	Male
Hair color	Blond
Eye color	Blue
Rank	Master Sergeant
Birthplace	Cincinnati, Ohio, US, Earth
Film portrayer	None
Television portrayer	Dan Shea
First appearance	Solitudes

Master Sergeant Sylvester "Sly" Siler is a fictional character in the science fiction television series Stargate SG-1 and Stargate Atlantis played by Dan Shea. Along with Sgt. Walter Harriman, he is one of Stargate Command's primary technicians and engineers. He is somewhat accident prone however and can often be seen in the SGC's infirmary being treated for various wounds such as burns from exploding conduits.

After intelligence training for the Special Operations Unit, Siler trained as a technician and an engineer, specialising in aerospace vehicle control and warning systems. He was a vital member of his team, responsible for seeking out the location of enemy radar installations, jamming radar and launching counter attacks.

Siler had been a vital part of base operations from the inception of the Stargate Programme. At the first possible sign of any Stargate malfunctions at the base, Siler is always on the scene. He is an expert in promptly recharging each individual chevron to it's proper power output and activating the Stargate from the central command main computer. He is also responsible for all key functions and can bypass the main programming system if a crisis occurs. Siler is also the maintenance engineer for the Alpha Site, making sure that the SGC have immediate access to the base in the event of a potentially devestating alien attack on Earth.

He also assisted Dr. Rodney McKay in plugging the Zero Point Module (ZPM) in the SGC's power mainframe which enabled the Atlantis expedition led by Elizabeth Weir to reach the Lost City of the Ancients. ("Rising")

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Trivia

In the background, you can also see Siler carrying an oversized wrench, which is something of a gag prop in the SG-1 series. Siler is sometimes seen handing it over to Martin Wood, who directs for the series, in the background.
Siler actor Dan Shea is also Stargate SG-1's stunt coordinator and Richard Dean Anderson's stunt double. He also served as Anderson's stand-in on MacGyver.