Kelly Severide and Stella Kidd ride a wooden rollercoaster of love, and in Season 9 Episode 15, it's literally on fire. "A White-Knuckle Panic" follows Severide as he has second thoughts about proposing to Kidd after she makes lieutenant. He confides to Casey that she once expressed she would never get married again, because she always wants the option to leave. Casey tries to reassure Severide, who becomes completely lost in his own head about his plans.

Later, when Kidd refuses to leave a restaurant fire without rescuing Severide, his nerves are replaced by a wild desire to propose right on the fiery spot. In true deeply-reckless-but-still-heartfelt Severide fashion, he does just that. Severide yanks off his helmet, inhales a bunch of smoke, and proposes to Kidd while flames flicker around them.

Kidd says yes and lays a kiss on Severide. That's right: The two impulsive lovebirds have a make-out moment inside a burning building. While we're not sure what kind of omen this is for a marriage, it's certainly proof that Severide is a hunk of burning love who follows his heart no matter where it leads him.