Smallville Season VI - Episode XXI

Senator Burke is murdered in an alley when Lois tries to interview him. The killer is Lois' childhood friend, Wes, who is transformed into a prototype of Lex's superpower army, with his brain programed to take orders. Upon seeing Lois, his consciousness is awakened, and he regains control of himself, but soon turns back to a killing machine when Lex's scientist uses satellite to reset the chip in his head.
Clark comes to the rescue, saving Lois, defeating Wes with his heat vision. Lois is convinced that Lex is accounted for Wes' death and vows to take revenge.
Now that Burke is dead, Martha is offered the Senate seat. She accepts and prepares to head for Washington.