MARVEL'S AGENTS OF S.H.I.E.L.D.
ABC, 9:01 p.m. ET
Tonight’s episode is really heavy: It not only has Coulson confronting his own death (and remember, he’s died before, in The Avengers movie), but has the S.H.I.E.L.D. team trying to save the Earth by amassing some strange elemental force called Gravitonium.