Per vtcapsfan99's request, I went back to review the final seconds of the 2nd Period.  As everyone (probably) knows, the final play of that period had a puck that went into the Capitals' goal as time expired.  Review of that play shows the NBC clock was off by 00.1 or 00.2 seconds, since the official game clock reached 00.0 before the puck crossed the line, even before it hit the post.  After a video review it was ruled No Goal and the Capitals went to intermission tied 1-1.  Here's the slowed down gif showing the Green light behind the goal, the NBC clock, and the puck.

But as vtcapsfan99 asked, how did the puck get past Neuvy in the first place?  The answer: Fedotenko on the backhand flings the puck towards the front of the net and the Caps have Yet Another Defenseman Deflection™ as the puck redirects into the goal off of Erskine's skate.  NBC only supplied two views of the play, the live view (replayed about 5 times since it's the only one they had available with a clock) and the overhead (shown only once).

So the Caps dodged a bullet, were saved by the buzzer, etc etc right?  Not so fast.  Let's rewind a couple of seconds.  Keep your eyes on 17-Dubinsky, 4-Erskine, and 10-Gaborik at the top of the crease.

That crosscheck has to be called.  The play should be blown dead, the goal should waved off without looking at the clock, and the Caps should start the 3rd Period with a Power Play. But none of that happened.

Number of penalties called in the 2nd period: Capitals - 4 / Rangers - 0 (Total: 8 / 4)