[Matrixbeast]

For Hibiki, it's episode 29. A nice, calm, wonderful episode watching the cast hang out together after a well earned victory.

For Drive, it was not Nira's introduction, but his pseudo redemption after 001's death. Because good lord, the things that character does and reveals after that point changes the series.

For Ghost, I think it would be the first time Onari opened his mouth. It really let you know just what you were getting in for.

For Agito, and I know it's strange to say, but when Houjou got caught up in Shouichi's antics that he missed a call to deploy G3. It really showed you just how infectious Shouichi's sincerity and smile were that even the man with the largest stick up his ass couldn't escape him.

For Ex-Aid, I'm thinking probably Dan joining the heroes. It really kind of solidified that the show will always staunchly refuse to let you know what direction things are going in