Well,9-1-1’s latest two-part emergency is officially here, and boy, is it a stressful one.

Back then, Chimney talked him out of it, and now, Buck does.

They also put out the fires in the process.

Bobby Nash, Chimney Han, and Hen Wilson tending to a lab fire in their gear in 9-1-1 Season 8

Image via ABC

There is then an explosion in the lab, and the protective door forcibly closes.

Still, his focus is on keeping Hen alive, which he does, before he starts experiencing symptoms.

9-1-1airs Thursday nights on ABC and is available to watch the next day on Hulu.

Buck Buckley and Ravi Panikkar having drinks in 9-1-1 Season 8

Image via ABC

Chimney Han in his gear during a lab fire in 9-1-1 Season 8

Image via ABC

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In the first half of the contagion-focused two-parter, the 118 have a number of close calls.

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