Thread:Tooniee/@comment-31527896-20170315215119/@comment-4287993-20170315215737

I must admit that that episode number is very confusing. Within the season, the two parts are viewed as one episode (so 22A and 22B, meant as just an extra long episode). However, as pointed out by someone of the crew at the time, because they produced two hours of television instead of the regular one hour, it's both the 242nd and 243rd episode for the series overall.

I know it's a little weird, but it's explained better here.