Possible Clues:

• Not a moment too soon
• At the critical moment imprisoned by sentence (2,3,4,2,4)
• Put away frequently, I'm contrite finally almost too late (2,3,4,2,4)
• With nothing to spare
• Jailed - frequently I'm free eventually at last possible moment (2,3,4,2,4)
• Imprisoned without supporting proof, receiving sentence at the eleventh hour
• Imprisoned at the critical moment? (2,3,4,2,4)
• When heroes appear
• Just made it ...
• Frequently arrested, I am free at last at the eleventh hour (2,3,4,2,4)