The two hackers on one keyboard portion of that scene may have been to screw with people. But the last portion of that sequence, I think, was actually meant to

The two hackers on one keyboard portion of that scene may have been to screw with people. But the last portion of that sequence, I think, was actually meant to pander to the elder generation that makes up the vast majority of their viewership. What happens at the end is that the older, no-nonsense detective just waltzes over to the outlet and unplugs the monitor, this stopping the hacker in his tracks. the two hackers give a sort of "why didn't I think of that look" as the old detective grins.