10. Gale force (Season Three, Episode Thirteen: "Full Measure")
Remember those happy golden bygone days when Walt committed murder so Jesse wouldn't have to? You know, like last episode? Heady times, man, heady times. Walt's hit on the corner boys alienated his boss Gus Fring enough for the guy to begin grooming his replacement; but rather than retire the hard way, Walt's willing to guilt and scare Jesse into becoming an honest-to-god hitman. Reasoning that if Gus has his former assistant Gale to run the cook he'll no longer need Walt alive – and if he no longer needs Walt aliven he'll also no longer need Jesse alive, either –Walt convinces Jesse that it's him or them, and he sticks to the plan even when he himself is seconds away from being killed by Gus's top henchmen, Mike and Victor. It's a move Jesse himself barely recovers from, but never forget who really pulled the trigger.