The last episode, Rufus is holding our Sibuna gang hostage. At some point, he drags Nina with him. What happens next? Fabian charges straight at Rufus, knocking him to the floor and allowing them to escape.
The second season finale had a few:
Jerome, held captive by Rufus, manages to crack Rufus' safe and recover the Frobisher gem.
Shortly afterwards, he takes advantage of Rufus' distraction, tackling him and manages to escape.
Eddie awakening to his power as the Osirian and using Senkhara's crown to banish her from Nina's body.
Rufus putting on the mask, getting possessed by Senkhara, and getting dragged down to Egyptian Hell. Have fun down there, you son of a bitch.
A smaller example: While being chased by Rufus, Alfie tries to close a secret entrance to buy him time. And while unintentional on his part, he closed the door on Rufus's arm. It's very satisfying to hear him scream in pain.
Victor encouraging Nina to give up the mask to Rufus, knowing fully well what will happen when Rufus puts it on.
Rufus: Listen to the old man, Nina." Victor: Yes Nina. You listen to this old man.
The third season finale:
Alfie fearlessly standing up to Fabian who's possessed, saying there's nothing he can do, and secretly video-taping the proof needed to convince KT about him.
Eddie gets quite worked up, allowing Team Evil to shove him into the Sinner's sarcophagi... only for nothing to happen. Eddie then comes out with a smug look on his face and mocks their efforts. "You really thought I was angry" indeed.
For the villains: you know that staff that would destroy Team Evil's efforts, and Eddie plants in the nick of time? Turns out they actually needed it for the ritual, and they played our heroes the entire time.