I would like to assure everyone that while Lucifer's sudden appearance might be upsetting to some of you, the situation is under control and you have nothing to fear.
[Law Enforcement]
I will be personally keeping an eye on Lucifer and doing my best to keep him from interacting with the general population. From what I've been able to get from him he has no intention of causing harm, but he does have a reputation as a liar.
Most importantly, Michael Langdon needs to be kept away from him and their communication monitored. I am not certain if it will work the same way here, but in the world I came from proximity to Lucifer made Anti-Christs much more powerful. He is dangerous enough.
[Team Free Will, their allies and the angels]
I have the situation in hand, best all of you steer clear. If you want to be useful get an eye on Michael Langdon, keep him bound, occupy him or kill him if you can do it safely. He and Lucifer need to be kept apart.