Related Clues:

• 'This is a Montague, our ___': 'Romeo and Juliet'
• The Joker, to Batman
• One to beat
• Moriarty, to Holmes
• Counter person?
• Newman, to Seinfeld
• The Axis, once
• Sentry's word
• The other guys
• One who isn't behind you
• No, to Bond
• Hardly a follower
• 'Friend or ___?'
• Red, e.g., once
• "Them"