"My Funny Valentine"
A drug addict becomes the prime focus of Danny and Jackie's investigation after his girlfriend is kidnapped and held for ransom. Erin and Charles move past the flirting stage.
Tom Selleck as Frank Reagan
Will Estes as Jamie Reagan
Donnie Wahlberg as Danny Reagan
Len Cariou as Henry Reagan
Jennifer Esposito as Jackie Curatola
Nicholas Turturro as Sgt. Anthony Renzulli
Amy Carlson as Linda Reagan
Sami Gayle as Nicky Reagan-Boyle