Agents of S.H.I.E.L.D. Season 3 Episode 19
Hive and Daisy attempt to recreate the ancient procedure that was conducted on him to alter his DNA and give him Inhuman powers, but without Kree blood, his subjects keep dying off. After many failed attempts, Hive faces his greatest fear and calls the Kree back to Earth, tasking Daisy with taking on out to drain its blood.
Daisy wants to save her friends at S.H.I.E.L.D. and her solution, at this time, is to make them all Inhuman. That's why she's alright with taking on a Kree. She wants to save them, and her powers are strong enough to weaken one to be drained to continue Hive's experiments. They want to turn regular humans into Inhumans, just like he was.
Meanwhile, Mack and Lincoln deal with their anger, guilt, and sadness over Daisy's condition, leading to some questionable choices. Mack disobeys Coulson's orders while a team is on the ground in Hive's town, approaching Daisy to save her where he learns of her plans to "save" them. Back at S.H.I.E.L.D., Lincoln injects himself with Fitzsimmons' serum to save "poor Daisy" from Hive's control, after Coulson ordered him to stay put and uninvolved.
Fitz and Simmons have their first disagreement as a couple over Lincoln and the lengths he'll go to free Daisy.