Todd immediately interrupted before Rogue could do something they'd all regret.

"Your questions end here, doctor." he said, stepping between them. "Cease your constant prattling and go do something useful, or go offer to fish with doctor Beckett. Last I heard you regretted not taking that trip with him on the day he died."

McKay's mouth dropped open. "Now listen here-"

The commander hissed at him. "No. Leave Rogue be, you questioned her for long enough, now you're just becoming obnoxious."

McKay, obviously hurt by Todd turning what had obviously been a secret he'd at some point wittingly or not revealed to the wraith on himself, folded his arms and adopted his smug attitude. "You can't hurt me."

"Oh, I think I can." Todd growled.

"Y-You wouldn't."

The look the wraith gave him plainly said he wasn't joking around, and, after another moment and a glance to Rogue, the doctor left the pair alone.