Sorry that it seems pretty confusing about the kills part.
The reason why Dr. Nose wants to kill the agents is, the agents crashed his plans...as said in the story.
Finn, Holley and Professor Z realized that when they traveled through time, Dr. Nose is alive until the present (in the present, Dr. Nose is 113 years old). In his whole life, he wanted to defeat the three. Imagine that? Secret is, he's a villain and he's keeping his plan.
The whole concept of this story is, Finn, Holley and Professor Z traveled through time to see the time the mysterious villain car who killed the agents, just only for his plan to succeed. It wasn't Finn's plan to go back in time. He accidentally pressed the button, together with Professor Z. When they went to 1964, Finn thought about Dr. Nose's plan (this is not mentioned in the story). He thought that Dr. Nose was the one who killed his fellow agents.
Still pretty confusing, but...the beginning may be easy to understand.
Episode 10: Daylights Are Spying (Final Episode)
Finn's mission is to stop the general director from doing wrong again. The director's next plan is to defeat Finn and a mysterious spy named Ray Boudrod. Even Grem wants to stop the general director. His lemon rule is to trust a simple evil car, not an extremely evil car like the general director. He said that Professor Z doesn't follow the rule. Will Professor Z be able to understand his henchman?
Note that some of the characters in the story are just the car names of some famous people and some are just made up. The status updates part are just parodies, and the last part is based from The Voice.
chief: Okay, the British spy, the racecar and a worker will accomplish the mission. (to his assistant) Tell the three to go on.
...
assistant: This mission is important. You must find the three henchmen of the general director who is a killer and defeat them. if you don't, there will be a bigger problem. Understand?
Jeffer Steeltire: We all understand, sir.
assistant: Okay, British spy, American racecar, and...a forklift, who's a worker...exit's right over there.
The door opened, the three jumped off and skydived (they are at the highest portion of the building) and each of them landed on several places. When they were looking for the henchmen, the henchmen caught the two, the racecar and the worker. The one left alive was Finn McMissile. He saw that the other henchman was at the top of the truck, so he jumped to it and fought the henchman. To stop the fight, the henchman throwed an opened lighter at the back of the truck and the fire came out, growing bigger and bigger. The truck crashed to the wall and was about to fall. Finn opened his attached parachute while both the truck and the henchman fell. Finn landed at the back of a fishing vessel.
fishing vessel: Are you going to race to Thames?
Finn: You did even know.
Meanwhile...
Acer: Hey, have you seen Grem?
Petey Pacer: No, haven't seen him.
Acer: What about you, have you seen Grem?
Fred Pacer: Nope. You ask the boss. Maybe he knows.
Acer: Sir, have you seen Grem?
Tubbs Pacer: You just wait for him, he'll be here later.
Acer: Where is he?
Tubbes Pacer: At the Gremlins meeting in Detroit.
Acer: Okay, I'll just wait for him.
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The World's Greatest Agents:Finn McMissile Episodes
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