The following link returned invalid result,
https://api.tvmaze.com/shows/706/episodebynumber?season=7&number=11
It supposed to return result, https://www.tvmaze.com/episodes/2148850/teen-titans-go-7x11-space-house-part-4
But it returned a result for Special Episode with the Number field == null, https://www.tvmaze.com/episodes/2105245/teen-titans-go-s07-special-teen-titans-go-see-space-jam