As noted, Kassius Ohno (Chris Hero) returned to WWE NXT at tonight's tapings from Full Sail University following a match that saw NXT Champion Shinsuke Nakamura and Tajiri take on Bobby Roode and Samoa Joe. The return was then announced by WWE and Ohno was welcomed back by Triple H on Twitter.
WWE posted a Facebook Live video of Nakamura celebrating and noted that the celebration was after the tapings. This is where Ohno made his return. It's still possible the segment was taped for the January 25th NXT episode but there is speculation that this was a dark segment that they may air as bonus footage on an upcoming episode.
You can watch Facebook Live video from the segment below. It was also posted to YouTube.