Summary
A serial arsonist cold case is reopened when Lt. Severide finds a connection to a recent salon fire. Firehouse 51 celebrates a retirement party.
Guest stars
Abraham Benrubi,
Anthony Ferraris,
Armand Fields,
Daniel Kyri,
Erin Breen,
Henry Walter Greenberg,
Jeanne T. Arrigo,
Kate Middleton,
Marco Tzunux,
Miguel Morales,
Peter Goldsmith,
Ramon Camin,
Randy Flagler,
Teddy Sears,
Zenzi Williams