Just a Regular Irregular


Episode Info

A math genius, who is part of Sherlock's network of "irregulars" experts, stumbles upon a body while participating in a math puzzle competition. Meanwhile, Watson reaches out to Kitty, after she learns about Kitty's past.


Jonny Lee Miller
as Sherlock Holmes
Lucy Liu
as Joan Watson
Aidan Quinn
as Tommy Gregson
Jon Michael Hill
as Det. Marcus Bell
Ophelia Lovibond
as Kitty Winter
Raza Jaffrey
as Andrew Paek
Rich Sommer
as Harlan Emple
Jacob Pitts
as Paul Ladesma
Danaya Esperanza
as Woman at Support Group
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Just a Regular Irregular Photos