The actor, who played Nathan Petrelli in the NBC series, was reportedly stopped on an LA freeway this morning after police saw his car travelling at 94mph and "straddling" two lanes.
A police report posted by E! Online states that officers "noticed an odor of alcoholic beverage emitting from within the vehicle".
The 44-year-old was reportedly then taken into custody and booked on suspicion of driving under the influence of alcohol. He was later released on bail of $15,000.
Representatives for Pasdar have yet to comment.