Agents Of SHIELD Season 4: 15 Characters Who Need To Return
13. Maria Hill
Last Seen: In contact with Coulson, who fed her the location of Baron von Strucker's base in season two's 'The Dirty Half Dozen' so that the Avengers could reclaim Loki's scepter, as seen in the opening scenes of Age of Ultron.
Despite Age of Ultron leaving Maria Hill working at the Avengers facility, the character completely sat out last year's Captain America: Civil War and the entirety of Agents of S.H.I.E.L.D.'s third season, without so much as a name-check as to what she's been up to since or where she might be now.
It's hard to imagine we'll be seeing her again anytime soon when films like Spider-Man: Homecoming, Guardians Vol. 2 and Thor: Ragnarok don't quite have room for her, which leaves Agents of S.H.I.E.L.D. as the best - and most logical - place for her to get to really make an impact on the MCU.
It's been several years now since How I Met Your Mother ended, making it all the more surprising that the show never snapped Cobie Smulders up to pick up the slack from the film side to further explore Hill, who remains in desperate need of some face time to develop into a fully-fledged character all her own.