Is this the most competitive category of the season?
Mark Strong, "Tinker Tailor Soldier Spy"
Pro: One of the more recognizable supporting actors over the past five years, Strong is usually giving a new twist to a heavy or villain such as in "Sherlock Holmes," "Kick-Ass" or "The Guard" (or being the only credible performance in "Green Lantern"). As British spy Jim Prideaux in "Tinker," Strong plays a man - like many in MI6 - who has given up so much of his own life for his country and has suffered personally for it. He's absolutely superb.
Con: Can more than one "Tinker" supporting player make the cut? If so, it may be hard for him to sneak by Cumberbatch.