From left to right, the characters are
Marco Bario - Episode "Killer KITT" - Was one of KITT's software creators that got cheated out of the credit by his co-worker. He can hack into KITT's systems and control him remotely. A skill he will find handy when his newest employer presents him with the remains of KARR.
Cameron Zachary - Episode " A Good Knights Work"- The only living proof outside of Michael's circle that knows Michael Knights true identity is Michael Long. Zachary was the true mastermind behind the events that took place at Comtron in 1982. Cameron would give anything to get revenge on Michael Long, and his new found freedom comes with a cost as he becomes paired with a rebuilt MBS protected Juggernaut with another little extra upgrade we aren't talking about yet....
Dr. David Halston - Episode "Knight of the Drones. Another inmate who has found new freedom in exchange for his talents. He is presented with a state of the art command center with a satellite up link and an entire fleet of drones at his fingertips.
And I'm sure its not a mystery as to who broke these guys out of prison and is using them in a grand scheme to bring down FLAG and rid the world of his doppelganger once and for all. Oh and Garthe is being funded by a terrorist group trying to get their hands on nuclear weapons, but thats all just subplot...distractions, you know the typical Knight Rider formula that we hope we get right
! So there you have it, the 4 main human bosses of Knight Rider: The Fan Game, and a short teaser/spoiler as to what key they play in our story.