At the end of the episode, Happy reveals to Toby that she wants to have a baby.
To plug the leak, they use a 3D printer and neon gas to create a custom plug. [S4E4] Nuke Kids on the Block
Paige confronts Happy about constantly "third-wheeling" on her dates with Walter. This tension persists throughout the mission until the two are forced to work together to save an unconscious Walter. At the end of the episode, Happy reveals
When the leak worsens, Walter is forced to launch the warhead into a remote area to prevent a catastrophic explosion on-site. This tension persists throughout the mission until the
Following Mark Collins' escape, Cabe faces serious charges. Sly’s intern, Patty, helps him search for an affordable lawyer, and ultimately, Sly decides to become Cabe's lawyer himself.
Beyond the main mission, several personal storylines unfold:
The team must stop the warhead from detonating while dealing with exposure to toxic vapors.