[SPOILERS for those not caught up on Agents of S.H.I.E.L.D. ahead.]
When Agents of S.H.I.E.L.D. first began, audiences quickly gravitated towards Leo Fitz (Iain De Caestecker) and Jemma Simmons (Elizabeth Henstridge). They formed a likable pair of British scientists that seemed to destined to be together, but it took them a long time to get to that place. Along the way, Fitz experienced a brain injury, Simmons was taken by the monolith, and other factors kept them apart. Finally, Season 3 answered fan prayers as the romantic relationship of "FitzSimmons" began.
The relationship was important to both characters moving into Season 4, but their dedication to S.H.I.E.L.D. soon eclipsed their relationship. Simmons has been promoted and taken out of the science department, while Fitz worked closely with Coulson or Dr. Radcliffe. Fortunately, once the latter part of season four returns in a few weeks, the two will be reunited.
EW recently interviewed showrunner Jed Whedon and asked about what the future holds for the fan favorite couple. He promises that the series return will give the couple more time together to try and work through a rough patch in their relationship.
"They’re suffering a little bit from working with the person you’re with. We want to make sure that we get to see them just be together and be FitzSimmons of old. That doesn’t mean there aren’t still bumps in the road ahead, but there’s a reason these two are together, and a reason the audience is rooting for them. So they’ll get over their bumps in the road and we’ll spend some time with them just being a couple and enjoy working together."
The midseason finale of Agents of S.H.I.E.L.D. appeared to put an end to the Ghost Rider-centric storyline that was a factor in keeping them apart. Now, Life Model Decoys are taking center stage and Aida (Malory Jansen) is striving to be more human. This will be a task that requires two of S.H.I.E.L.D.'s smartest individuals to tackle.
It seems unlikely that Aida will be given the same level of screen time as Ghost Rider, which should open the door for more supporting characters to have larger roles. Hopefully, this will be the case for FitzSimmons and will benefit the series in the longrun.
FitzSimmons relationship is certainly bolstered by Caestecker and Henstridge's long-time chemistry, and return to their relationship is essentially a return to the show's core DNA. More FitzSimmons in the season to come is likely be a welcome sight for its S.H.I.E.L.D.'s most stalwart fans.
Agents of S.H.I.E.L.D. season 4 continues on Tuesday, January 10, 2017 on ABC.