Highlights from the Second Episode of Season 2 of Elementary

When a well-respected mathematician is found dead, Holmes and Watson set out to solve a murder and the purpose of the highly guarded equation he was trying to decipher.

Sherlock

1. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Holmes and Watson

2. Holmes and Watson

Holmes (Jonny Lee Miller, left) and Watson (Lucy Liu, right) set out to solve a murder when a well-respected mathematician is killed in cold blood. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

3. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Watson

4. Watson

Watson (Lucy Liu) works to help solve the murder of a well-respected mathematician who is killed in cold blood. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Holmes

5. Holmes

Holmes (Jonny Lee Miller, right) and Watson (Lucy Liu, left) set out to solve a murder when a well-respected mathematician is killed in cold blood. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc.
Holmes and Watson

6. Holmes and Watson

Holmes (Jonny Lee Miller, right) and Watson (Lucy Liu, left) set out to solve a murder when a well-respected mathematician is killed in cold blood=. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

7. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

8. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Watson

9. Watson

Watson (Lucy Liu) works to help solve the murder of a well-respected mathematician who is killed in cold blood. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

10. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

11. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to deciphe. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

12. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Sherlock

13. Sherlock

Sherlock (Jonny Lee Miller) sets out to solve the murder of a mathematician as well as the purpose of the highly-guarded equation he was trying to decipher. Photo: Mark Schafer /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Joan meets with the son of a former patient

14. Joan meets with the son of a former patient

Joan (Lucy Liu, right) is conflicted when Joey Castoro (Jeremy Jordan, left), the son of a former patient, approaches her for a loan. Photo: Patrick Harbron /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved
Joan

15. Joan

Joan (Lucy Liu) is conflicted when the son of a former patient approaches her for a loan. Photo: Patrick Harbron /CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved