Happens again in "Organ Grinder". It's only a telephone conversation but he tells his mysterious contemporaries that if they want to interfere with his business and territory, they should do so in person.
Not to mention the raid on the RV in the same episode where Nick is about to be jumped by a Geier, only for Renard to shotgun the bastard through the window.
In the episode Let Your Hair Down, a small CMA to the doggie-wash hiker couple who managed to escape their attacker, get out of the woods and call the cops. Another one goes to Holly Clark, who got away from her kidnapper at age seven (and left him crippled), and then saving the couple from the criminal and then helped Nick and Monroe when his brothers tried to go after them.
Juliette gets one in "Game Ogre". She comes home from shopping to find Nick having the tar beaten out of him by the aforementioned Ogre. Does she scream and panic like your garden variety distressed damsel? Nope, she instead runs to the kitchen, and ends up winging a pot full of boiling water at the Ogre (who's about a foot taller and twice as wide), disabling him enough so that he gives up and takes off.
At first, she reaches for the knife block, then grabs the pot of water. One can assume that she kept her wits about her enough to realize that trying to fend off a bruiser like Stark with a kitchen knife would be futile, while blinding him with boiling water was a better tactic.
Nick stepping into the arena to defend Monroe during Last Grimm Standing. He even gets a Back-to-Back Badasses moment with Monroe.
Monroe gets one the same episode. He starts the fight losing, badly. But then when the bad guys are coming up behind Nick, BAM! Monroe with a shield to the guy's face.
And another for Monroe back in "Game Ogre". Stark's going after Hank and Nick can't do anything to help from the hospital bed. All Nick expects Monroe to do is get the Ogre-killing gun to Hank. When that was no longer an option, Monroe could have just walked away and said "Sorry, man, tried my best". Did he? No. He breaks out the gun and snipes Stark from the brush just in time to save Hank.
Juliette gets an awesome moment in "Plumed Serpent". Most girls who get kidnapped, tied up, and held captive in a creepy mine would be too panicked to do more than thank their rescuer profusely. Juliette on the other hand is enough of a Badass that once her hands are free, she gives a kickass one-liner and punches her captor out in one blow.
Nick gets one in "Love Sick" when he kisses Adalind to get her to bite his tongue. Why? Because the blood of a Grimm depowers Hexenbiests, and Nick gets it into Adalind's mouth this way.
Nick vs. two grimm reapers. "Next time send your best" indeed.
Nick vs. The Woman in Black. Nice moves, mom!
Anytime Capt. Renard speaks French note Sasha Roiz is trilingual, speaking Russian, French and English fluently, since it inevitably leads to a Cultured Badass moment from him.
One for Hank. Not a Grimm, not a Wesen, and he's fresh off a Broken Masquerade after weeks of nightmares and thinking he's going mad. And then a Coyotl in full Game Face rushes him. What does Hank do? Punches him in the face.
The Seelenguter coming together to take down the Blutbad priest who'd been misleading them (after his masquerade was revealed by the woman scorned). Twenty-five sheep vs the big bad wolf... and the sheep kick ass!
Although it may also count as nightmare fuel, as they beat/rip the guy apart while he screams in agony.
Also, the fact that said scorned womandoesn't take revenge on her teenaged, pregnant rival, but subverts all the Yandere stereotypes by leaving her lover to his (admittedly well-deserved) fate, taking the embezzled money and the pregnant girl to the Bahamas, where it's implied they'll live comfortably ever after.
Though to be fair, she is living off stolen church money so... YMMV on that one.
Angelina's final episode is one crowning moment after another. First she calmly and efficiently takes down the guy who was trying to rape her, then she manages to get word to Monroe that he's got a target on his back (putting her neck on the line to do so), then she sacrifices herself to save his life.
Also, the cobra Wesen has Nick on the ropes and is about to finish him off - at which point Hank shoots him.
Renard completely owning Mia (the Royal visiting Portland) by managing to seemingly figure out that she'd come to Portland to go after Nick by taking out Monroe, which ended up failing, then getting to her airplane before her and saying that he "might" kill her, but that depended on "so many things".
To clarify: Renard's a bastard son of a Royal and a Hexenbiest. Mia's a fullblooded, legitimate Royal. Dude's got cojones!
Juliette's freaking out due to a GIANT abyss appearing in her living room. First she accidentally drops her phone down the hole, then all sorts of supernatural things start happening (the stairs multiply infinitely, the door is locked, and strange lights and voices start emanating from the hole), but then... Her phone starts ringing. She gets this determined look on her face, growls "To hell with this!" and steps out over the edge, prompting things to return to normal (at least until the end of the episode...).
It's speculated that this might be a result of her memories trying to return to her.
Then, in "Mr. Sandman", after initially being frightened by an apparition/hallucination, she chases after the thing, despite being clearly terrified and worried she's losing her mind.
Juliette and Renard doing their damnedest to fight their attraction to each other, including Juliette clocking Renard a good one - twice!
Nick and Monroe easily taking out the four Hundjager who put Hank in the hospital.
Nick tracking down the fly Wesen, beating him up, then holding him down so the others could scoop his eye out. He did this all while blind.
Also, the fly's intended victim who, unlike many others, actually had the sense to cover her eyes during their fight then finally stabbed the bastard with a kitchen knife.
At the end, Nick honing his super-hearing with Monroe, managing to hit every single object thrown at him, whilst blindfold.
Adalind managing to get herself pregnant by either Renard or his half-brother.
Which, while it may not seem all that awesome, goes to demonstrate that while she may not have her powers any more, she's still got the ability to play politics and manipulate the power players...except maybe she doesn't.
Renard is meeting with his top spy, and sees a suspicious man leave behind a suitcase. He recognizes it's a bomb. So does he grab his associate and run like a bat out of hell out the back door? Nope! He tells his associate to get down, then he actually goes for the suitcase himself, grabs it, and runs with it to the back of the restaurant. He barely manages to throw it into an abandoned alley before it explodes, sending him flying across a table. He gets back up, goes to the front of the restaurant where the assassin is waiting for him. They both draw guns, and Renard blows him away.
In "One Angry Fuchsbau", Monroe defending Rosalee against an angry Zeigevolk.
The takedown of the Volcanalis, a creature made of molten rock, who's ilk were responsible for Vesuvius, Mount St. Helens and pretty much every major eruption in history. Nick, Monroe, Markus and Renard lure him to a warehouse by stealing his rocks, before freezing him solid with liquid nitrogen. Nick then hands Markus a sledgehammer and tells him to avenge his wife's death at Volcanalis' hands. He does.
You have to admit the plan to take out Frau Pech was pretty good... right down to telling that person directly how the plan is going to work every step of the way.
In the premiere of Season 3, Nick shows us once again why you never go half-assed against a Grimm:After being captured by Baron Samedi and falling into a comatose state, he is locked into a steel, padlocked coffin and loaded into a plane heading out of the country. To the Baron's immense surprise, Nick starts going into the zombie state and starts trying to punch his way out of the coffin. When he finally busts open the lid, Samedi simply spits in his face again. Which subdues Nick again... for about 10 seconds, after which he lunges at the Baron with all of his zombie-Grimm strength and gives him the beating of his life, all while the Baron tries unsuccessfully to get Nick back under control. The fight gets so bad that the pilot and co-pilot are ultimately dragged into it. The end result? The plane crashes, Baron Samedi is possibly dead, the pilots are heavily injured and zombie!Nick is still out on the run with only a few scratches to show for. Never underestimate a visibly living Grimm.
Nick and Hank's rescue of the naiad Elly in "One Night Stand." They both take on two Wesen, with Nick doing his Grimm fighting skills and Hank delivering one Megaton Punch after another and even grabbing one of them and body-slamming him to the ground. Then Nick goes underwater for an extremely long time to complete the rescue.
A standout, IMO, is when one of the naiads woges and goes after them, thinking that he'll have the upper hand because of his Game Face. Nick and Hank calmly No Sell him and kick ass. Nick's justified, since he's a Grimm, but Hank's just a regular dude. Looks like all his exposure to Monroe and weirdness paid off!
To some extent, the titular Wesen in "El Cucuy". A Cool Old Lady who's species' MO is to follow the cries of frightened women to troubled neighbourhoods and eliminate all the criminals there. She spends the entire episode calm (except of course when violently murdering her targets), is clearly trying to help those in need, and even has an alibi for being soaked in blood pre-prepared for when the police find her. At that age the lady is getting off purely via Refuge in Audacity, and she knows it.