While the folks at Warner Bros. and DC have chosen to keep their movie and TV universes separate (for now), the Marvel Cinematic Universe is famous for its 'everything's connected' tagline. With content that stretches over big screen movies, TV shows, and Netflix Originals, having each one tie-in with one another can be tricky.

Case in point; in the season 2 finale of Marvel's Agents of S.H.I.E.L.D. the world was contaminated with Terrigen, a substance which can turn ordinary people into what the show calls Inhumans. There have been many of these superhumans popping up all over the world in the show - and presumably in the MCU - but when HitFix asked Captain America: Civil War co-writers Christopher Markus and Stephen McFeely about it, they were puzzled.

"I have to confess, having come here, I’ve seen no TV since I got here in April", said Markus. "I haven’t seen the vast majority of this season of ‘Agents of S.H.I.E.L.D.’" McFeely added "Is there really fish oil? What are you talking about?"

In Captain America: The Winter Soldier the collapse of S.H.I.E.L.D. had dramatic ramifications for Agents of S.H.I.E.L.D., so it's a little odd that major, worldwide events that happened on the small screen seemingly has zero effect on the movies. As we get deeper into the MCU, it will be interesting to see if the popular show can get some recognition on the big screen.

Directed by Joe Russo and Anthony Russo, and starring Chris Evans, Robert Downey, Jr., Scarlett Johansson, Chadwick Boseman, Tom Holland, Anthony Mackie, and Sebastian Stan, Captain America: Civil War opens in UK cinemas on April 29, 2016 and May 6, 2016 in the US.

Images: Marvel/ABC