Creator Mike O’Brien broke the bad news on Twitter, encouraging fans to watch the four remaining episodes:
I'm intensely sad to announce that AP Bio will be ending after this season. This has been my favorite project of my life and that's because of the amazing writers, cast and crew. As most canceled shows probably feel, I think we were just hitting our stride and everyone was still
— Mike O'Brien (@MikeOBrienXOXO) May 25, 2019
loving the work, so this is very hard.