*sigh*
What breathless nonsense. In visual conditions there's no way anyone's landing on an occupied strip of pavement, night or not. ATC may have ordered a go-around but that doesn't mean the AC crew hadn't already noticed their error. If the aircraft on C were waiting to take off they would have been at the threshold end and clearly visible.
It certainly wasn't anything close to a disaster. An embarrassing, recoverable error if true, at most.