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Episode Info

A highly respected mathematician is murdered. Holmes investigates and tries to discover the purpose behind a guarded equation the victim was attempting to decipher. Meanwhile, Watson is conflicted when the son of a former patient asks her for a loan.


Jonny Lee Miller
as Sherlock Holmes
Lucy Liu
as Joan Watson
Aidan Quinn
as Tommy Gregson
Jon Michael Hill
as Det. Marcus Bell
Jeremy Jordan
as Joey Castoro
Lynn Collins
as Tanya Dempsey
Khalil Kain
as Benny Charles
Rich Sommer
as Harlan Emple
Rick Holmes
as Jason Harrison
Rock Kohli
as Cabbie
Nick Maccarone
as Dean Kaneshiro
Simon Feil
as Office Worker
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