The tension between the Inhumans and humans heightens in "Agents of S.H.I.E.L.D." season 3 episode 19.

"Agents of S.H.I.E.L.D." season 3 episode 19 is entitled "Failed Experiments." According to Spoilers Guide, the episode will see Coulson and his group race to oppose Hive's authority over the supernatural group Inhumans. This is secondary to the the latter's vicious plan for the human race. Whether S.H.I.E.L.D. Succeeds with its plans against Hive is yet to be revealed.

"Failed Experiments" follows "Agents of S.H.I.E.L.D." season 3 episode 18, which is entitled "The Singularity." In the episode, S.H.I.E.L.D.'s force was left faltering and destroyed while Hive went strong in gathering the Inhumans to their side. With such events, Fitz and Simmons led the team, hoping that they would be able to stop the villain for good.

In line with Joe Russo and Anthony Russo's upcoming Marvel Comics film "Captain America: Civil War," it is revealed that its aftermath affects the upcoming episode of "Agents of S.H.I.E.L.D." As per Spoilers Guide, Daisy's prophecy is heading to a huge loss, with the impact of the "Civil War" leaving the agents with no choice but to register the Inhumans in episode 20.

According to Screen Rant, if the conflict involving Hive has not yet been resolved in "Agents of S.H.I.E.L.D." season 3, it is assumed that the parasitic Inhuman will serve as the prime villain of the series' season 4.

"Agents of S.H.I.E.L.D." season 3 episode 18, "The Singularity," aired on Apr. 26 while episode 19, "Failed Experiments" is set to air on May 3. Episode 20 airs on May 10 while the Russos' "Captain America: Civil War" is slated to premiere in theaters in the United States on May 6.