9-1-1 Season 9 Episode 16 aired on ABC on April 2. The official synopsis for the latest episode of the firefighter procedural titled 'Where There's Smoke' reads as follows:“The 118 must account for every decision made during a recent fire call when the team’s actions are investigated for possible mistakes. Meanwhile, Buck works behind the scenes to support his team as he waits to learn if he can return to the station.”The 9-1-1 Season 9 Episode 16 cast is an impressive blend of the series' main and supporting characters, who made the narrative even more gripping when the 118 faced scrutiny from the review board, following a rescue mission gone wrong.Here is the complete 9-1-1 Season 9 Episode 16 cast.9-1-1 Season 9 Episode 16 cast View this post on Instagram Instagram PostFrom a tense review board meeting to Chimney's job coming into question and the 118's impressive teamwork, the latest episode was filled with twists and turns. Here is the complete 9-1-1 Season 9 Episode 16 cast:Kenneth Choi as Howard "Chimney" Han: The Sons of Anarchy star led the 9-1-1 Season 9 Episode 16 cast. While Chimney had been a great leader and followed protocol during the call, he was blamed by the review board when one of the apartments caught fire. Buck's replacement created problems by revealing that Chimney was frustrated after multiple calls and even punched the building manager in the face.Aisha Hinds as Henrietta "Hen" Wilson: Newly returned paramedic Hen was also on the fateful call that brought the 118 under scrutiny. As instructed by her Captain, Hen also followed protocol and checked the building but to no success. Like a true friend, she had Chimney's back during the review board meeting and also came to the rescue when they found a hidden group of migrants in the building.Ryan Guzman as Edmundo "Eddie" Díaz: The Step Up alum is the next main addition to the 9-1-1 Season 9 Episode 16 cast. Eddie was another member on the call who faced the angry mob when one of the apartments caught fire. When Chimney's job was called into question, he did everything in his power to find the cause behind the fire, teaming up with Ravi and Buck in the process.Angela Bassett as Athena Grant: The American Horror Story star is the main addition to the 9-1-1 Season 9 Episode 16 cast. Athena had to intervene when the angry mob resorted to violence and blamed the 118 for the fire. Later, she teamed up with Detective Hooks when the squad discovered a hidden group of migrants in the building. While Athena wanted Hooks to take strict action against the building manager, her colleague was hesitant, suggesting that he is likely a corrupt officer.Oliver Stark as Evan "Buck" Buckley: Buck was taking time off from his firefighting job until this harrowing incident pulled him right in. Thanks to Buck's investigation with Eddie and Ravi, the 118 found that the building fire was started by one of the migrants, who were stashed into the building illegally by the manager. They finally got the medical attention they needed, with Chimney getting an all-clear from the review board.Here's the supporting and guest cast in 9-1-1 Season 9 Episode 16 View this post on Instagram Instagram PostIn addition to the main 9-1-1 Season 9 Episode 16 cast, 'Where There's Smoke' featured the supporting ensemble, including Jennifer Love Hewitt as Maddie Buckley, Corinne Massiah as Athena's daughter, May Grant, Elijah M. Cooper as Athena's son, Harry Grant and Anirudh Pisharody as Ravi Pannikar. The supporting characters came together to help the 118 clear their name from the ongoing investigation. The latest episode proved that the firefighter procedural is all about teamwork.Rounding out the 9-1-1 Season 9 Episode 16 cast are guest stars Josh Stamberg and Michael Johnston as Detective Hooks and Sam, respectively. Stamberg is best known for playing Jay Parker in Lifetime's legal comedy-drama series Drop Dead Diva. He has also appeared in small-screen series such as Parenthood, WandaVision, The Rookie, Grey's Anatomy, Based On A True Story and The Time Traveler's Wife. Michael Johnston, who played Buck's replacement in the latest episode, is best known for playing Corey Bryant in MTV's supernatural series Teen Wolf and Zak Storm in the eponymous animated series.You can stream the latest episode on Hulu.For the latest scoops on your favorite TV shows and movies, follow SoapCentral.