A string of robberies happen at apartment complexes when a firehouse lockbox containing a key goes missing.

The Intelligence unit asks Cruz to go undercover at another firehouse because Hank Voight suspects that a fellow firefighter might the culprit.

Note: This episode reunites Gary Cole and Jesse Lee Soffer from The Brady Bunch Movie.

On May 15, 2018, longtime cast member Monica Raymund who plays Paramedic Gabriela Dawson, announced her departure from the series citing her desire to get on with the "next chapter in life.

"[26] On September 21, 2018, NBC announced that newcomer Annie Ilonzeh would join the series as a regular playing Emily Foster replacing Raymund on Ambulance 61.