Elementary

Name: Solve for X
Duration: 1 h

Series 2 Episode 2
Solve for X
Duration: 60 minutes
High Definition available
Subtitles available

Sherlock investigates the murder of a mathematician and the significance of a top-secret equation he was trying to decipher, while the past comes back to haunt Joan.

S2 E1 · Step Nine
Holmes is reunited with his estranged brother in London.
S2 E2 · Solve for X
Holmes tackles a top-secret equation linked to a mathematician's murder.
S2 E3 · We Are Everyone
Sherlock looks for a contractor who disappeared after leaking top-secret information.
S2 E4 · Poison Pen
A nanny is suspected of poisoning her employer.
S2 E5 · Ancient History
Sherlock and Joan stumble across the body of a former assassin.
S2 E6 · An Unnatural Arrangement
Captain Gregson's home is invaded by a masked gunman.
S2 E7 · The Marchioness
Mycroft asks for his brother's advice on a case involving a former love interest.
S2 E8 · Blood Is Thicker
Mycroft asks his brother to return with him to London.
S2 E9 · On the Line
A cold case becomes a burning issue for Sherlock.
S2 E10 · Tremors
Sherlock ends up in the dock defending his unusual methods.
S2 E11 · Internal Audit
A hedge fund manager is killed just hours after a journalist uncovers his Ponzi scheme.
S2 E12 · The Diabolical Kind
Sherlock is reunited with Moriarty following an abduction.
S2 E13 · All in the Family
Sherlock and Joan delve into New York's criminal underworld.
S2 E14 · Dead Clade Walking
Sherlock tries to help Randy avoid a relapse.
S2 E15 · Corpse de Ballet
Sherlock investigates the murder of an up-and-coming ballerina.
S2 E16 · The One Percent Solution
Sherlock is forced to reunite with his former Scotland Yard colleague Gareth Lestrade.
S2 E17 · Ears to You
Sherlock investigates the kidnapping of a woman long presumed dead.
S2 E18 · The Hound of the Cancer Cells
Sherlock and Joan investigate the death of a pioneering cancer researcher.
S2 E19 · The Many Mouths of Aaron Colville
Sherlock investigates a serial killer known for biting his victims.
S2 E20 · No Lack of Void
Holmes tries to track down a killer who could launch a bioterrorist attack.
S2 E21 · The Man with the Twisted Lip
The unexpected arrival of Mycroft causes tension between Sherlock and Joan.
S2 E22 · Paint It Black
A brotherly spat between Sherlock and Mycroft leads to life-or-death consequences.
S2 E23 · Art in the Blood
MI6 intervenes in a seemingly routine murder investigation.
S2 E24 · The Grand Experiment
Mycroft faces charges of murder and treason.