Squad 451, also known as the "Star Squad," was formed to take down President Snow and the Capitol. The squad consisted of Katniss Everdeen, Gale Hawthorne, Finnick Odair, Jackson, Boggs, Homes, Leeg 1, Leeg 2, Mitchell and later, Peeta Mellark, who still had issues with his previous hijacking whilst the Squad was on its missions, ultimately leading to him killing a member of the squad. As you can see below, most members didn't make it out alive.
The Squad consists of 10 members:
- Katniss Everdeen
- Gale Hawthorne
- Finnick Odair (deceased)
- Jackson (deceased)
- Boggs (deceased)
- Homes (deceased)
- Mitchell (deceased)
- Leeg 1 (deceased)
- Leeg 2 (deceased)
- Peeta Mellark (replacement) 
Along with the ten soldiers, Squad 451 is accompanied by Katniss's camera crew, including:
- Cressida, film director
- Messalla (deceased), asst. director
- Pollux, cameraman
- Castor (deceased), cameraman
During the filming of a propo Boggs steps on a pod, blowing off his legs. Mitchell tackles Peeta. When Peeta throws him off, he triggers a second pod, getting caught in a net made of barbs and starting a wave of a tar-like substance. The team goes into a nearby house, where Katniss kills a Capitol woman when she tries to call for help. Boggs dies and transfers the Holo to Katniss, which angers Jackson, who first demands that Katniss transfers it to her.
They move through the Capitol and eventually find their way into the sewers and to the Transfer, where Pollux had worked as an Avox. When they awake from a night in the sewers, white lizard mutts, which Katniss says smell like blood and roses [like Snow], chase them through the sewers. Messalla is killed by a pod which melts his skin like candle wax. Jackson and Leeg 1 are killed in the "Meat Grinder", a pod with dangerous, spinning blades. Finnick, Homes, and Castor are killed by the mutts. After Finnick's death, Katniss says the keywords "Nightlock Nightlock Nightlock" to the Holo, activating the self-destruct mode, before throwing the Holo into the sewers, killing the mutts.
Cressida leads the remaining five members into her old friend, Tigris' house, who owns a fur store. They hide in the basement and while Pollux and Cressida mourn the crew's death, Gale and Peeta talk about who Katniss will choose, which she hears. They leave disguised as Capitol citizens, when a rush of Peacekeepers separate them all and capture Gale. He asks Katniss to shoot him but Katniss fails to hear the request. The group never reunites but Pollux and Cressida are later confirmed to have survived the attack on President Snow's mansion. In the attack, Prim, Katniss's sister, dies which leaves Katniss distraught.