Watch Chicago Fire Online: Season 4 Episode 21

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Did Otis go for a blood test?

OnĀ Chicago Fire Season 4 Episode 21, Cruz and Brett had to get sneaky when they knew that Otis needed to find out more about his health.

Meanwhile on this crazy drama, Dawson saved a young boy from an apartment fire, but what was he hiding?

Also, Severide hit a wall while advocating for new fire masks, but did he give up?

Use the video above to watch Chicago Fire online to get up to speed with the latest drama for Firehouse 51.

Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.

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Chicago Fire Season 4 Episode 21 Quotes

Kidd: What I am talking about is artisanal ice cubes. Look, Severide knows. Severide, you ever order a Scotch on the rocks and they bring you one, giant, perfectly clear ice cube?
Severide: Yeah.
Kidd: So, it's pretty awesome right?
Severide: Yeah, it keeps the drink cold, if that's what you mean.

Brett: If he said the bruises went away...
Cruz: I don't buy it. Otis gets a hang nail, he doesn't shut up about it for a week. This he says is nothing?