Mace’s arrival on the Zephyr to arrest Robbie and Daisy forces the team to confront their loyalties.
The "accident" that paralyzed the Reyes brothers is revealed not as a random act of gang violence, but a hit ordered by Joseph Bauer to stop Eli Morrow. [S4E6] The Good Samaritan
The episode also highlights the internal tension within S.H.I.E.L.D. under Director Jeffrey Mace. Mace’s arrival on the Zephyr to arrest Robbie