Pascal and Severide revisit a storage facility fire searching for new evidence. Cruz aids Mouch's exam preparation. Novak proposes a whole blood program to Chief Robinson.

Cast: Taylor Kinney, David Eigenberg, Joe Minoso, Christian Stolte, Miranda Rae Mayo, Daniel Kyri, Hanako Greensmith, Jocelyn Hudon, Jake Lockett, Dermot Mulroney, KaDee Strickland, Anthony Ferraris, Randy Flagler, Holly Hinchliffe, Keith Kupferer, Amy Sloan, Steven Strait, Al Vicente