Terry Silver is back and Johnny suddenly remembers him as the sensei who assisted Kreese for a short time when Johnny first stared cobra kai.

Silver was sexually abusive towards Johnny and Johnny starts needling Daniel with questions, trying to figure out if the same thing happened to Daniel (would prefer if Daniel only experienced Silvers messed up training and not any abuse and that he was too 'old ' for Silvers taste)

+ if Kreese, while still a villain in his own right, is actually enraged when he finds out what happened to Johnny and makes Silver disappear.