Related Clues:

• ''Who goes there?'' response, perhaps
• "Who's calling?" response
• Words after "Open up"
• 'You're looking at him!'
• Phone ID?
• Knocker's words
• ''Who's there?'' answer
• Doorbell ringer's response
• Formal response to "Who goes there?"
• Response after knocking
• Words upon removing a disguise
• Words from a well-known caller
• Formal answer to "Who's there?"
• Response with a ringing doorbell
• Answer to "Who's there?"