Best Supporting Actor in a Drama Series

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William Shatner, "Boston Legal" (ABC)

This is Shatner's fifth Emmy nomination. He won the Emmy for Outstanding Supporting Actor in a Drama Series for "Boston Legal" in 2005 and the Outstanding Guest Actor in a Drama Series Emmy for "The Practice" in 2004.

T.R. Knight, "Grey's Anatomy" (ABC)

This is Knight's first Emmy nomination.

Masi Oka, "Heroes" (NBC)

This is Oka's first Emmy nomination.

Michael Emerson, "Lost" (ABC)

This is Emerson's second Emmy nomination. He won the Emmy for Outstanding Guest Actor in a Drama Series for "The Practice" in 2001.

Terry O'Quinn, "Lost" (ABC)

This is O'Quinn's second Emmy nomination in this category for "Lost."

Michael Imperioli, "The Sopranos" (HBO)

This is Imperioli's fifth Emmy nomination in this category for "The Sopranos." He won the award in 2004.