I can't believe my brain just went blank on this, but I don't remember which one to use. Is it:
No sooner did they lead him into the interrogation room again, than he found that every instinct of thought was bent on what he could say, or do, to keep them from detaining him.
or
No sooner did they lead him into the interrogation room again, then he found that every instinct of thought was bent on what he could say, or do, to keep them from detaining him.
Thank you!!!
(Normally I don't have trouble with this one, but something is throwing me off this time.)