A SWEET 16 CELEBRATION TURNS INTO A CRIME SCENE WHEN THE BIRTHDAY GIRL'S STEPMOTHER FALLS TO HER DEATH, ON "INSTINCT," SUNDAY, JULY 21

"Big Splash" - A Sweet 16 celebration turns into a crime scene when the birthday girl's stepmother falls to her death and the guests and staff are put under a microscope by the NYPD. Also, Ryan finds a new lead in his investigation, and Lizzie receives some positive news at the precinct, on INSTINCT, Sunday, July 21 (9:00-10:00 PM, ET/PT) on the CBS Television Network.

REGULAR CAST:

Alan Cumming (Dr. Dylan Reinhart)
Bojana Novakovic (Det. Lizzie Needham)
Daniel Ings (Andy)
Naveen Andrews (Julian Cousins)
Sharon Leal (Lt. Jasmine Gooden)

RECURRING CAST:

Michael B. Silver (Det. Kanter Harris)
Danny Mastrogiorgio (Det. Anthony Fucci)
Stephen Rider (Zack Clark)
John Mainieri (Det. Jimmy Marino)
Travis Van Winkle (Det. Ryan Stock)

GUEST CAST:

Andrew Polk (Doug the Medical Examiner)
Haley Murphy (Alex Gerich)
Ben Ahlers (Boyd Carter)
Kathryn Erbe (Caitlyn Gerich)
Simon Longnight (DJ)
Betsy Wolfe (Ella Betts)
Anna Mikami (Evie)
Nat Cassidy (Jay Middlebrook)
Ted Sutherland (Justin)
Nadia Alexander (Kim)
Zo� Winters (Molly Tynan)
Pilar Witherspoon (Mom)
Tessa Albertson (Shayla)
David Alan Basche (Steve Gerich)
Paul Pontrelli (Sully)

WRITTEN BY: Marc Dube

DIRECTED BY: John Behring