WHEN A MYSTERIOUS WOMAN CLAIMING TO KNOW SHERLOCK'S BROTHER COMES TO HOLMES AND WATSON FOR HELP, JOAN SUSPECTS THEIR NEW CLIENT IS BEING DISHONEST, ON "ELEMENTARY," SUNDAY, APRIL 10

"All In" - A mysterious woman who organizes illegal, high-stakes poker games arrives on Holmes and Watson's doorstep and tells them her life is in danger claiming to be a former associate of Mycroft, Sherlock's brother. However, as the pair investigates, Joan becomes suspicious that their new client isn't being truthful, on ELEMENTARY, Sunday, April 10 (9:00-10:00 PM, ET/PT) on the CBS Television Network.

REGULAR CAST:

Jonny Lee Miller (Sherlock Holmes)
Lucy Liu (Joan Watson)
Aidan Quinn (Captain Tommy Gregson)
Jon Michael Hill (Detective Marcus Bell)
John Noble (Mr. Morland Holmes)

GUEST CAST:

Samantha Quan (Lin Song)
Sepideh Moafi (Sofia Darrow)
Tim Guinee (Agent Dean McNally)
Kushtrim Hoxha (Tugay Celik)
Jonathan Avigdori (Vural Celik)
Daniel London (Manteo Pena)
Grainger Hines (James "Jimmer" Hobberkin, Jr.) Nadia Dajani (ME Grannis)
Stephen DeRosa (Mel Cheney)

WRITTEN BY: Kelly Wheeler

DIRECTED BY: Aaron Lipstadt