***MAJOR SPOILERS AHEAD***

Netflix original series, House of Cards, has never shied away from controversial storylines. The narrative has followed Frank Underwood's rise to power from Congressional whip to Vice President to President. His meteoric ascent to power was always trailed by a dark shadow, though — one that perhaps mirrors the real life brutality, scandal, and corruption that accompanies the machinations of most high-level politicians.

House of Cards is particularly ruthless in this regard. Frank Underwood has personally killed two people. One, a journalist with whom he has been having an affair. She learns too much, and during a discreet subway station meeting, Frank takes advantage of a well-timed metro train to push the young woman into its oncoming path. Another Underwood victim is a ruined, alcoholic candidate for governor of Pennsylvania (who had become politically toxic for the Democrats). Late one evening, he passes out in his car, and Frank, who has driven him home, leaves the gas running and closes the garage door.

Frank, of course, has addressed the camera and been open about his Machiavellian philosophy of power. "For those climbing to the top of the food chain there can be no mercy," Frank once said. At one point, he also stated, "I'd push [the Russian president] down the stairs and light his broken body on fire just to watch it burn if it wouldn't start a world war."

Season 4 of House of Cards picked back up in the middle of the savage Democratic primary, where  Underwood is pitted against an ethical judicial reformist, Heather Dunbar, who promises to restore dignity to the White House. Unfortunately, her brief inconsequential meeting with journalist-turned ex-felon Lucas Goodwin, who pleads with her to listen to his evidence of the president's crimes, spells her end. After Goodwin attempts to assassinate Underwood, rendering him on the brink of death, Dunbar's dalliance with Goodwin is a nail in her political coffin.