Frank and Joe raced upstairs. They found their Mom on kitchen floor. There was broken glass everywhere. Both of them knelt down next to her.

"Mom, are you ok?" Frank asked.

"Th...that came through the window," she said through a shaky voice. She pointed at the silvery dart in the wall.

Joe, enraged, ran outside.

"Joe! Where are you going?" Frank shouted as he ran after his brother. He found Joe searching through the trees.

"Joe... what are you doing?" he whispered.

"He's gone," Joe said.

"Let's go back to Mom," Frank replied. Joe nodded and they went back into the kitchen. They found her about to start to clean up the mess of broken glass.

"Are you hurt Mom," Joe asked.

"No. I called the police, they're on their way over," she said. "Did you find him?"

"No, he was too fast." Joe replied, "Go sit down, we'll clean up this mess."

Frank helped his shaken mother into the living room, while Joe put some water to boil to make tea. Then they waited for the police to arrive before cleaning the mess.

As Sergeant Con arrived, Joe took the tea into the living room. Con began to take Laura's statement while Officer Dwight took pictures of the scene.

"I was just about to leave the kitchen when I noticed a note from the frig had fallen onto the floor. I knelt down to pick it up...Almost the same time...th...that's when that that thing came through the window," Laura explained.

Joe handed her a cup of hot tea, which she gratefully accepted.

"Did you two see anything outside?" Con asked Joe.

"No. I ran out there, but by that time, whoever it was had disappeared," Joe replied.

Frank and the other officer came into the living room.

"I checked around outside. I didn't see anything," Officer Dwight explained to Con.

"Better gather up that dart, and rush it to the lab." Con said, "It looks like the same type of attack that was used on Mr. Dell."

"Any word on his condition?" Frank asked.

"He's improving. He's still in rapid detox. It could take another 14 to 16 hours, before they'll know if he'll recover completely," Con replied.

After completing the reports, Con and Officer Dwight left, taking the dart with them.

"I better clean up that mess," Laura said, rising from the sofa.

"Don't worry about it." Joe said, gently pushing her back to the sofa, "We'll clean it up."

Frank and Joe returned to the kitchen.

"I'll get a board from the garage, and put it over the hole until we can get Tony to replace the glass," Joe said. Frank nodded and began to sweep up the broken glass. Tony Prito was the Hardys' Italian friend and schoolmate. He often helped the Hardys' during their cases. His father was a construction contractor, while his uncle owned an Italian restaurant.

Twenty minutes later, Joe had boarded up the broken window, while Frank had finished cleaning the remaining broken glass. They ran the vacuum over the surfaces to make sure all the broken glass was cleaned up.

Frank knew his little brother was angry. He was angry too, but he had to keep Joe calm.

"Joe you have to calm down," Frank said.

"How can I calm down when someone tried to hurt Mom?" Joe said, his arms swelling.

"I'm angry too. Let's go over those files again," Frank said, trying to calm Joe down.

Joe took a deep breath and nodded.

The brothers were looking over the files when they heard someone entering the house.

"Is anyone home?" the familiar voice of their father called out.

They came upstairs to find their Mom in their father's arms.

"What happened?" Fenton asked.

Frank explained what happened.

"Thank goodness you're all ok," Fenton said, embracing his wife tighter. Both Frank and Joe could see he was shaken.

"Why don't you go upstairs and lay down," Fenton suggested. He led her upstairs. The brothers returned to their father's office to wait for him.

Nearly an hour later, Fenton entered his office.

"Is Mom ok?" Frank asked.

"She's asleep, but I think she'll be ok," his father replied.

Fenton sat down in his desk chair.

"Did you find any links between the victims?" he asked.

"So far no, but I did see one thing though?" Frank said.

"Well?" Joe asked.

"All the victims were attacked during the day or early evening, and always somewhere where a person could see them during the drug's effects," Frank said.

"That doesn't narrow it down much, but it's a start. I need you to see where those darts could be bought or made," Fenton said.

"Do you have a picture of the dart?" Frank asked.

Their father nodded and gave them several pictures, plus a detailed description of the dart.

"It's too late now, let's get an early start tomorrow," Frank suggested.

Joe agreed, although he would try to sleep in for a change, since it was going to be a Saturday.

"Come on baby bro, wake up," Frank said, shaking his brother's shoulder. Joe moaned and turned over.

Frank pulled a pillow out from Joe's head and dodged the other pillow Joe had thrown at him.

"Ok, I'm awake," Joe replied. He glanced at the clock, it read 7:00AM.

"Are you sure we have to start early," Joe asked.

"Yes, I'm sure, now hurry up," Frank said. He left Joe's room just in there to dodge the pillow thrown at him.

Twenty minutes later, Joe came downstairs, fully dressed.

"Hey, did Mom leave already?" Joe asked, as he poured cereal into a bowl.

"Yeah. Her next class is today," Frank replied.

Joe nodded and started eating the cereal and milk.

"Where do you want to start first?" Joe asked, after swallowing a mouthful of cereal.

"The zoo. Then from there, animal control," Frank replied, then started eating his own breakfast.

The brothers quickly finished breakfast, and after cleaning up, they left a note for their Mom before driving over to the zoo.

"Who would we talk to about those darts?" Frank asked the guard at the gate.

"That would be Jenny Thompson. She's the director. Her office is at the end of this trail," the guard replied.

Frank and Joe started out on the trail. It was still very cold, and they walked fast to stay warm.

It would take them only ten minutes to arrive at Jenny Thompson's office. Frank knocked on the door. A woman in her late thirties with short red hair opened the door.

"Jenny Thompson?" Frank asked.

"That's me. Come on inside, it's cold out," Jenny said.

Frank and Joe walked into the heated office.

"I'm Frank Hardy and this is my brother Joe," Frank said.

"Oh yeah, I've read about you two in the paper," Jenny said.

"We're looking for these types of darts," Joe said, handing her the picture.

"Hmm...they do look like the ones we use here. But we keep track of every dart we use," Jenny explained.

"Who has access to them?" Frank asked.

"Besides myself? The guards, the vets, and the two senior staffers we have here," Jenny replied.

"Do you have an exact description of the dart?" Jenny asked.

Joe handed the description over to her.

"The needle shaft is too small to be an animal tranquilizer, and the capsule is thinner," Jenny said, after reading the description.

"Where would someone get that type of dart?" Joe asked.

"Legally, you have to get a special permit to be able to carry them, and another permit saying you've taken the courses on how to use and fire them. Plus, there's the gun that's used. It's designed specifically to fire the darts," Jenny explained.

"Could you check your supply and see if any are missing?" Frank asked.

Jenny nodded, "Wait here, this will take a few minutes."

"What do you think, Frank?" Joe asked, after Jenny had left the room.

"Lots of people have access to the darts. It depends on how easy it is to alter the record," Frank replied.

Joe took the hint. A surveillance, undercover, or night job was coming up.

Jenny came back. All the darts are there. I checked the records, none are unaccounted for," Jenny replied. Frank noticed that she her eyes were largely dilated for brightness of the room.

"If something turns up, let us know," Frank said, as he handed her one of his father's business cards, "Just call that number and leave a message."

"OK, I will," Jenny promised.

With that the brothers left her office.

As soon as they were in their van, Joe started the heater.

"Do you want to come back later tonight?" Joe asked.

"Let's see what the animal control people have to say," Frank replied.

Joe nodded. "Are they still located near the SPCA on Cherrywood Street?" Joe asked.

"Yeah and afterwards we can try the park rangers," Frank said.

"Oh no, we're not missing lunch," Joe said.

"Don't tell me you're hungry already?" Frank asked. Although he shouldn't have been so surprised. Normally his little brother had a big appetite. Nobody in his family worried about that though, nearly everything Joe ate turned to muscle.

"Nope, just making sure. Everybody gets angry when I don't eat," Joe said.

Frank nodded, "I see your point. Ok we'll stop for lunch."

The SPCA would have the same darts that the zoo would have but only one person, the vet, had access to them.

As the brothers were eating lunch, they were debating whether or not to try the Ranger Station.

"They might just have the same security that the SPCA does, but so far we don't have any suspects," Joe said.

"I know what you mean, let's try the station just to be sure," Frank replied.

Just then, the van's cell-phone rang.

"Hello?" Frank said. "Where?.....Ok, we'll go over there first." He hung up the phone.

"What happened?" Joe asked.

"That was Dad, another victim was struck," Frank replied.

"Who?" Joe asked.

"Kyle Anderson," Frank replied.