It took three days for Starscream to find a way out of his house arrest. Not that anyone knew, per se, but it would be fine as long as no one saw him. All he wanted was to see what Megatron was up to. Simple as that. All he needed were more details about the silly battle. None of the babysitters he'd gotten so far would spill, so he realized he needed to take matters into his own hands.
Hey, his babysitter for the moment had been Lugnut. Knocking him out had been fun. Served the pathetic, tattling bucket of bolts right.
Luckily for Starscream, as serious as things were getting, no one was really out wandering the halls for the Hell of it anymore. He did have to stay close to the walls and look over corners, but no one got in his way. Then he could transform his arm (the baby was fine as long as he didn't transform his stomach) and tap into his tracking device. Finding Megatron would be a piece of cake. He'd find him, listen in on battle plans, and split. Megatron would never know.