Beyond the Aquila Rift was a mind f**k for sure. Really liked that episode. It stuck with me a bit at the end.
I also LOVED Sonnie's Edge. I'd love to see more from that world. That was a great twist at the end.
Others I really enjoyed were Suits, Sucker of Souls (although there isn't much resolution), Shape-Shifters, Lucky 13, Blindspot, and Secret War.
I think all of those except for Lucky 13 could be expanded into a movie or mini-series. I'd love to see more of those worlds.
I hope to see more of this going forward.