Stan By Me
S1, E19: Charlie thinks he's got an upgrade when STAN is replaced by younger-looking HUNTER, who doesn't obey the laws of robotics and can fight alongside him, but then HUNTER goes bad and turns on Aaron.

S1, E19: Charlie thinks he's got an upgrade when STAN is replaced by younger-looking HUNTER, who doesn't obey the laws of robotics and can fight alongside him, but then HUNTER goes bad and turns on Aaron.