Emergencies include a skating mishap at an ice show, an accident involving a self-driving car and a fulfillment warehouse robot going rogue. Meanwhile, Eddie's after-hours fight club gets out-of-control and Hen struggles in her relationship with Karen.
Athena was suspended temporarily for her drastic actions taken while solving the case of Emmett's murder in "Athena Begins".
Maddie is also still suspended from work and mentions she is back in therapy which had been recommended to her in "Monsters".
Bobby mentioned that a simple wardrobe malfunction such as the sequin falling in the ice skating incident can make the skate stop. A similar incident happened on the British television series, Dancing on Ice, though no one was hurt. 
This is the last episode that the character Lena Bosko is featured in.
It's mentioned that the 136 captain, Ronnie Cooper recognized Eddie from the Tsunami. However during the scene when Ronnie arrived at hospital Eddie wasn't wearing anything with the 118's identification on him.
Preview The Most Unforgettable Episode Of The Season Season 3 Ep. 8 9-1-1