Related Clues:

• 'Rin Tin Tin' shower
• Age
• 'That's ___!'
• '___ Yes!' (old political placard)
• One for the history books
• Period in history
• Elizabethan ___
• Entirely
• See 72-Down
• Christian ___
• '20/20' network
• Ballpark fig.
• Complete
• Two or more periods
• See 31-Down