Dawson tackles her first fire response as she is mentored by Hermann.br br Season 3 Episode 4 " Apologies Are Dangerous"br Severide gets involved in a subway shooting which questions his position at the firehouse. Meanwhile, Dawson has her first day as a candidate at Firehouse 51 and Mills adjusts to his new role as a Paramedic. Elsewhere, Brett's ex-fiancé comes to town to win her back.