Author's Note:

Hey guys! Name's Cake, and this is my first Lab Rats fanfiction I'm proud of! Sorry if anything's out of character or something, I'm trying my best! The picture is Chase as a dog, so yeah! I don't want to give much away, see you at the end!

Story:

Chase gasped in shock as a green laser was shot at him from the shadows. Adam turned around seeing the green beam hit something above Chase and his little brother shoot away, nearly being hit by a heavy object, a satellite to a house to be exact. Leo and Bree turned as well, tilting their heads. They had just been celebrating how quick their mission was but now they realized they were trying to be shot down as yet another beam shot out of the darkness, still aimed at the youngest Davenport.

"There's someone, or something there," Chase muttered under his breath, to himself of course but Bree heard him.

"Yeah, no kidding. Thanks, Captain Obvious," she snapped, crossing her arms as her gaze narrowed.

"You're welcome, Sargent Sarcasm," he replied back, shockingly calm. Adam looked confused, but before he could question the names, Chase continued to speak. "Come on, let's check it out."

The four each got a power ready-Adam: Super strength, plus a bit of blast wave, Bree: Super-speed/Super agility, Chase: Laser bow, and Leo: Power sphere-and crept towards, only to see a familiar face.

"Miss me?" The teenage boy smirked, causing Chase to yelp and gasp, nearly crashing down onto Leo.

"Sebastian!" He yelped, his eyes wide. "Y-you..How..."

Bree narrowed her eyes even more, who knew how she could still see, and crossed her arms. "How did you escape?"

"I may not have my chip, but I'm not stupid. Tank and Lexi helped out, we distracted the guards and got out, easy," Sebastian replied. "I got my bionics back."

"I don't know what your plan is, Sebby, but I do know you wont get away with this," Adam growled.

"Oh believe me, Adam, I will," the young male chuckled. He started up a power sphere, like Leo's, and smirked wider. "I may not have all my bionics back, as it was rewired, but..."

He shot it at Bree, and Chase, without thinking at all, ran forward.

"I won't let you hurt the thing I love most: My family!" Chase screamed. Everything seemed to happen in slow motion for Adam, Bree, and Leo. They watched, frozen, as the deathly beam hit their brother straight in the chest, right where the heart is located as well.

"Bullseye," Sebastian chuckled. He watched as the family crouched around their brother, shaking him and trying to wake him. "Bye-bye, now." With that, he geo-leaped away.

"Chase," Bree whispered, crying. "Wake up."

Leo, who had his ear pressed to his brother's chest, rose his head with tears sliding down his cheeks. "He's not breathing and I can't hear his heart."

Adam watched, anger and sadness blazing in his eyes. "I will destroy him for what he did to you."

Chase's eyes were open, glazed with determination, love, fear, and bravery that were all starting to fade. Bree, sobbing now, closed them.

"I love you, Chasey," she sobbed, feeling Adam bringing her in for a hug. "You just saved my life!"

"You'll be remembered as a hero, Chase. Thanks for always being there, even though you could be annoying," Leo agreed, moving his brother so Chase's head was resting on his lap. "It should've been Sebastian."

"I'm sorry I wasn't the best brother," Adam began, kissing his deceased brother's forehead. "I did..I take that back...do love you, little brother. I miss you already."

There was silence as the three siblings cried and sobbed, grieving their brother. It went on until Chase's com-set beeped.

"Chase? Chase, come in. Did you complete the mission?" Mr. Davenport asked. Bree took the com-set, but Adam yanked it out of her arms and pressed the button.

"M-Mr. D-Davenport..." He cried. "Something bad happened!"

"Adam? What happened? Why do you sound like you're crying? Where's Chase?!" Davenport yelled.

Leo took the communication device. "He's..H-he's dead, Big D."

"WHAT?!" This time, both Douglas and Davenport screamed. Bree took the device this time.

"Mr. Davenport, Chase h-he saved my life. F-from S-Seb-Sebastian," she whimpered.

"Sebastian?" Douglas echoed. "You three come back straight away! Leave Chase there, I'll go get him. Donnie, you alert the president we lost Chase."

"Hey, I'm the eldest, I make the rules!" Davenport shot back.

"Not when my son is dead!" Douglas snapped. "Kids, hurry up."

Bree nodded slowly. "Y-you heard him..."

Adam and Leo each gave Chase a final goodbye kiss, Bree after, and they each hesitantly held each other's hands then Bree super-sped them home.

Chase's limbs soon turned furrier and shorter, turning a golden-brown color until in the place of the youngest 'deceased' Davenport, lay a small golden-brown and white dog.

A/n:

So, did you enjoy? If so, yay! If not, aww. Sorry to hear that. :(

Anywho, Chase isn't really dead obviously. He still has his bionics. Oh, and by the way...Sebby ain't the only villian back. ;)