Adding missing episode of M*A*S*H

https://www.imdb.com/title/tt0638420/?ref_=ttep_ep1  Epsisode 10.1 'That's Show Biz' is listed bit not 'That's Show Biz' part 2. I can do one of two things... change the running time on the first part from 25 minutes to 50 minutes and adjust the title to 'That's Show Biz' part 1 & 2 or I can add the episode, create the cast and credits but only after reordering the proceeding 20 episodes first. Can anyone see another way?