When the remains of a Sandhog miner who disappeared in 1948 are found in a subway service tunnel, the team is prompted to reopen the case when they suspect the victim might have been murdered for being a union activist. Meanwhile, Lilly's old flame Ray returns.
- Kathryn Morris as Lilly Rush
- Danny Pino as Scotty Valens
- John Finn as John Stillman
- Jeremy Ratchford as Nick Vera
- Thom Barry as Will Jeffries
- Tracie Thoms as Kat Miller
- Brennan Elliott as Ray Williams
- Lee Burns as Bobby McCallister (1947/1948)
- L. Scott Caldwell as Alice Stallworth (2006)
- Jack McGee as Bobby McCallister (2006)
- Neil Jackson as John "Boomer" Donovan
- Enuka Okuma as Alice Stallworth (1947/1948)
- Skyy John as Nate Stallworth
- Marc Ewing as Hank Bishop
- Gino Anthony Pesi as Mateo Zaccardo (1947/1948)
- Unknown child actor as Sam Bertleman Jr. (1947/1948)
- Joe Young's case box is visable when Jeffries puts Donovan's case box away.
- The term "sandhog" is traditionally associated with NYC rather then Philly
- Big Bill Broonzy "Sixteen Tons"
- Son House "John The Revelator"
- Hank Williams Sr. "Move It On Over"
- Louis Jordan "Buzz Me Blues"
- Louis Armstrong "That Lucky Old Sun "Just Rolls Around Heaven All Day)"
- Closing Song: Louis Armstrong "I Wonder"