Henry and Jo got out of the car. "Okay, the fingerprint belongs to Hans Koller. He has no prior criminal record, is not officially a suspect, and I ask the questions," Jo said. She started walking to the front door of the suspect's house.

"Alright then. I'll just watch and observe." He started to go around the back. "Hey. Doctor Morgan. We don't have a warrant... Doctor Morgan, you said you would watch and observe!"

"Oh, I'll just watch and observe through his windows. Occasionally."

"Can you dial down the creepy a bit?"

"That's hardly proper English, Detective."

"It's vernacular," Jo hissed.

Henry pointed. "Look at that. Probable cause."

"It's a dead rat. Henry, New York is full of dead rats. It's the dead rat capital of the world."

"I'm aware of the fact that New York has a rat problem, but I actually think London has New York beat as far as that moniker. At least it did when I left it..."

"Why are we talking about dead rats?" Jo asked, frustrated.

"Because this one has foam around the mouth. It died from something it ate."

"Like rat poison?"

"Or human poison." Henry walked over to a greenhouse, and opened the door. "See? Monkshood, also known as aconite. So, Detective... are you beginning to see why bringing me along was a good idea?"

"You're gloating, Henry," Jo said, rolling her eyes, although there was a hint of a smirk on her face.

"I am not." Henry started walking to the garage. Jo quickly stood in front of him.

"Hey, stop... stop! Do not move. This garage could be filled with poison, I will go first."

Henry looked shocked. "Do you have that much of a chronic heroine complex that you would walk into a room probably filled with poison to save the weirdest, creepiest person you've ever met?"

"Don't make this weird, Henry." Jo cleared her throat, and pulled out an ancient Japanese samurai sword. Holding out Chuckles like an allegedly rabid squirrel-shield, she charged headlong into the fray of Koller's garage, screaming, "Come and get me, you spawn-of-Loki! To AASGAAARD!"

"Too late..." Henry muttered, following her. "Jo, no one's here." He motioned to a beaker filled with purple powder. "It's aconite."

"Okay, just back up, don't touch anything."

The garage door opened. Henry and Jo hid in a back room. "Stay put," Jo whispered. She ran out into the main garage.

"Freeze! NYPD. Hands where I can see them. Hands where I can see them, now."

"Take it easy, buddy. Nice and easy there, guy ol' pal. It's okay, I'm being polite, see!"

"I didn't ask you to be polite," said Jo, taking a step forward.

"Well, then I won't be!" Koller splashed some poison on Jo's hand before running out. "Auggh!" Jo screamed.

"Detective, your hand!"

"I'm well... aware of that... Henry... ugghh..."

"It's working its way into your bloodstream. We have less than a minute."

"I gotta wash it off."

"No, we need to set it on fire," Henry stated matter-of-factly. "Here, ethanol." Before Jo could react, Henry got out a flamethrower. "This might hurt." He then took aim, and shot a stream of embers at Jo's hand.

"WHAT THE HELL IS WRONG WITH YOU! AHHHHH!" Henry then grabbed her hand and dipped it in a bucket of water. Jo gave him a death glare, saying under her breath, "I will cut you."

"Do what you will. I had to neutralize the poison. Trust me, aconite is a terrible way to die."

After a short while, the police came. Lieutenant Reece briefed the rest of the officers. "Hans Koller, turns out he used to be a chemist until four years ago when his wife, Karen, was in an accident on the subway. The driver of the train that killed her was the same conductor that was just poisoned. The guy's been planning this for a long time."

Jo walked over to Henry. "Hey, you okay? You seem confused."

"Jo, I just set your hand on fire, and now you're speaking to me as if I did you no harm."

"You did save my life." Jo put her non-burned hand on his shoulder.

"Also... you accidentally dropped your squirrel while approaching Koller."

"Oh gods, no! NO!" Jo pulled out her samurai sword, placed it on the ground with the point straight up, and stood on her tiptoes.

Henry pulled her back. "Stop trying to fall on your own sword, Jo."

She noticed some rope and a statue of a cross on the lawn, and proceeded to tie herself to it. Henry quickly untied her. "Get off your cross, Jo." She saw a dead mare that Koller had been experimenting on. Jo started punching it. "Why? WHY?!" she yelled, crying hysterically.

"Stop beating a dead horse, Jo. And Chuckles isn't dead, he's in a coma in the vet's office. I personally had him taken there."

Jo sniffed. "Thank you, Henry." She sat down next to him.

Henry thought for a moment. "Koller's motive... it doesn't make any sense. He did it because the subway conductor killed his wife."

"That actually sounds like an understandable motive to me."

"Yes. It's just that I thought he was after... something else. I was wrong." Jo smiled at him.

Henry paused. "You want a drink."

"Oh, Henry, it's just that I'm –"

"I'm not hitting on you, Detective. I was merely stating a fact. You want a drink."

"Henry, you're totally hitting on me. That's a fact too. And..." Jo thought for a moment. 'Well, he can't be worse than Andre.'

"Alright. See you around seven-o'-clock, Henry."