Blond Ambition you knew Nick would become a Grimm again
Goodnight You knew would over come being a zombie.
Woman in Back and Cry Havoc. There was not indication where the show was going.
Of the endings Blond Ambition would be the best. The amount of plaining. The number of people Adalind had to manipulate. Then to pull it off even with Trubel as the unknown wild card. You have to admit Adalind deserved credit for that one.
1. Cry Havoc by a long stretch. Unpredictable, exciting, and really a serie changer.
2. Blond Ambition. You cannot deny that Adalind schemed this one out perfectly, the timing, the planning, the structure. She did everything good in this episode, and the ending was thought of as well.
3. Goodnight, Sweet Grimm. Eventhough I knew that Nick would become normal again after being hit by the Cracher-Mortel, the episode itself was pretty cool to watch.
4. Woman in Black. Out of all the 4 season finales, I think this is the least exciting one, but that can be possibly blamed for, because it was the first season, and there wasn't really any action-oriented stuff other than Nick fighting Wesen. ( Remember we didn't have Hexen-Juliette, Adalind scheming to take Nick's Powers, or a Cracher-Mortel cooking up an army of zombies ).
Blond Ambition didn't have a lot of action, but I didn't mind, I like slow episodes. It was that everything happened, one after the other,mlike dominos falling. Renard gets shot, then Trubel decapitates Weston Steward, then Wu sees a Grimm diary, then Grimm looses his powers, then Adalind leaves for Vienna. It was once Renard got shot that all of that just came tumbling down. And the resolution was also great, because it has season long consequences. Nick getting powers back lead to Juliette being a Hexenbiest leading to her death.