Mark Sheppard

Mark Andreas Sheppard is a British-American actor and musician. He is often credited as "Mark A. Sheppard". Sheppard is known for his recurring roles as the demon/King of Hell Crowley on Supernatural, lawyer Romo Lampkin on the Battlestar Galactica reboot, Interpol investigator James Sterling on Leverage, and small-time crime lord Badger on Joss Whedon's Firefly.

Firefly · S1, E1

Serenity

The crew of Serenity is eager to rid themselves of an easily traceable cargo they salvaged from a vessel adrift in space, totally unaware that a passenger has brought an even more dangerous cargo aboard.
Firefly · S1, E4

Shindig

In order to secure a job transporting cargo off-planet for a client, Mal attends a social event where a dance with Inara leads to him being challenged to a swordfight in defense of her honor.
The X-Files · S1, E12

Fire

A man with pyrokinetic powers stalks members of the British aristocracy.
White Collar · S5, E1

Retour de flamme

Peter est en prison pour meurtre, et Neal doit aider à l'innocenter.
White Collar · S5, E3

One Last Stakeout

As Peter settles into a promoted position at the FBI, Neal has to pull off a brazen museum heist right underneath the FBI’s nose.
Supernatural · S5, E21

Two Minutes To Midnight

Bobby sells his soul to the demon Crowley in exchange for the location of the Fourth Horseman, while Dean goes head to head with Death to stop the Apocalypse.

Mark Sheppard

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Guest Appearances