"Unfriended" Synopsis & Cast List

Here's the official description for the third-to-last episode of Elementary.

Holmes and Watson join forces with Holmes’ father, Morland (John Noble), to enlist his vast criminal network to help disassemble tech billionaire Odin Reichenbach’s crime prevention system, on ELEMENTARY, Thursday, August 1 (10:00-11:00 PM, ET/PT), on the CBS Television Network. Lucy Liu directed the episode.

REGULAR CAST:
Jonny Lee Miller (Sherlock Holmes)
Lucy Liu (Joan Watson)
Aidan Quinn (Captain Tommy Gregson)
Jon Michael Hill (Detective Marcus Bell)
James Frain (Odin Reichenbach)

GUEST CAST:
John Noble (Morland Holmes)
Kristen Bush (Annie Spellman)
Charlie Semine (Stewart Pringle/Wilson Kubiak)
Jodi Long (Mrs. Tseng)
Roderick Hill (Wesley Conrad)
January Lavoy (Chloe)
Lisbeth MacKay (Mrs. Conrad)
Eric Elizaga (Eldon)
Kristoffer Cusick (Gene)
Rachael Holmes (Antonia)
Gabe Doran (Propane Salesman)

WRITTEN BY: Bob Goodman
DIRECTED BY: Lucy Liu