Mohinder wanted to run. He wanted to go with Molly and make sure she made it away safely, but he knew he couldn't. He needed to keep Danko occupied long enough for Molly to get away. She was his responsibility, and more importantly she was his family, and he wasn't going to let anything happen to her if he could help it. He stood and released Molly's hand pushing her in the direction she needed to go. He only hoped she would go and not wait.
"Danko," he said, with far more calm than he actually felt. He wouldn't attack or give the man any excuse to use the gun. "I don't imagine you've heard of knocking? I would suggest you get out of my flat and go back to your own before you do something you'll regret." Not because he thought the man would actually regret his actions, but they'd make a lot of people angry. "Molly is just a child, she does not need to be involved in this."
And he had the strange notion that Danko would at least have the decency not to shoot him in front of his daughter.