Trivia: The call sign for the mobile command center is SHIELD 616. Earth-616 is the name for the primary universe in Marvel comics.
Trivia: Stan Lee makes a cameo on the train.
Continuity mistake: When Fitz and his dad are walking together and talking about Dr. Radcliffe, the tablet computer that Fitz' dad is holding jumps from his left hand to his right hand between shots.
Phil Coulson: You know, it'd be nice, if for once, Thor and his people sent the god of cleaning up after yourself.
Question: Is there any explanation to how Agent Coulson is alive even after Loki killed him in The Avengers?
Chosen answer: Coulson believes he was resuscitated then sent to Tahiti to recuperate. "A magical place," he calls it. But in the "Agents of S.H.I.E.L.D." episode "The Magical Place", Coulson, through a mind-reading machine, learns that he was treated by S.H.I.E.L.D. and a fake memory of Tahiti was placed as a "mask" of sorts over the painful memory of the operation, which involved a drug seemingly of alien origin to repair the damage, coupled with a lot of morally dubious surgery.