8) Turn, Turn, Turn – Agents Of S.H.I.E.L.D.
Infamously, the majority of Agents of S.H.I.E.L.D.’s first season failed to strike a chord with many fans who felt that the show was not capitalizing on its potential. But that all changed with the season’s seventeenth episode, which exploded both the show’s internal storyline and its role in the wider universe.
Tying into the newly-opened Captain America: The Winter Soldier, “Turn, Turn, Turn” reveals that Phil Coulson’s team has also been infiltrated by nasty HYDRA agents all along. Starting from here, AoS became the place to go to see the fallout of the movies – it’s since dealt with the aftermath of the likes of Thor: The Dark World and Captain America: Civil War. What’s more, it also brought rogue agent Grant Ward into his own, marking his transition into the villain who would stick around for three whole seasons. In short, it’s a landmark episode for the show and the first legitimately great TV episode of the Marvel Cinematic Universe.