Chromedome had covered his tracks. He always did, that was what made him the best Mnemosurgeon in existence. Knock Out wouldn't be remembering that he had fixed Chromedome's needles any time soon. He could have gone further and brainwashed the medic for later use, but he was still feeling a little rebellious.

He arrived at the location that Prowl had mentioned and walked calmly in.

"Knock knock."

Casual as ever, he knocked his fist against the side of the cave wall.

"Anyone home?"