Daniel Buran (Level 26: Dark Origins) has joined the cast of Alan Ball's vampire drama True Blood for a meaty seven-episode arc on the upcoming fourth season. The actor, repped by Rebel and Leverage, will play Raoul, the werewolf packmaster of Shreveport.

Iranian-born character actor Shaun Toub (Iron Man, The Last Airbender) has been added to the cast of another HBO drama series, the upcoming Luck, as a recurring. Luck, a David Milch/Michael Mann collaboration starring Dustin Hoffman, takes a provocative look at horse racing -- the owners, gamblers, jockeys and industry players. Abrams Artists-repped Toub will play Doctor Khan, a local emergency room doctor with a surprisingly complicated backstory.

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