Part 2 of a crossover with Chicago PD Season 5, episode 16 "Profiles."
At the end of the episode, Kelly is watching the movie 'Rear Window' with Stella
Chief Bodden use the term Aplomb to define the behavior of some people of house 51 and said they were up to the task. The origin of this term, aplomb, comes from the French and from the two words A and Plomb. The second one is for lead, it means in construction that something is perfectly vertical and so stable (as they were checked with a string and a lead weight).