ELEMENTARY Season 4 Episode 9 IMAGES: “Murder Ex-Machina”

Holmes and Watson will search for a computer hacker responsible for three murders in Elementary’s January 21st installment.

“Murder Ex Machina” will see the pair investigating an elusive hacker’s latest crime — that of the murder of a Russian billionaire who was visiting New York City at the time of his death.

Meanwhile, we hear Morland Holmes will reassert himself into Joan’s life when he surprises her with a solo dinner invitation.

Exactly what does Morland want to keep from Sherlock? We’re guessing, based on recent story developments that include blackmail and murder, that the list is even more extensive than Sherlock himself realizes.

The episode airs Thursday, Jan. 21 (10:00-11:00 PM, ET/PT) on the CBS Television Network.

We’ve got a collection of new images from “Murder Ex Machina” to share in our gallery below.

Elementary stars Jonny Miller as Sherlock Holmes, Lucy Liu as Joan Watson, Aidan Quinn as Captain Tommy Gregson, Jon Michael Hill as Detective Marcus Bell and John Noble as Morland Holmes.

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ELEMENTARY: "Murder Ex Machina"

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"Murder Ex Machina" -- Holmes and Watson search for a computer hacker responsible for three murders, including the death of a Russian billionaire who was visiting New York City. Also, Joan is surprised to receive a solo dinner invitation from Sherlock's father, on ELEMENTARY, Thursday, Jan. 21 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured (L-R) Jonny Lee Miller as Sherlock Holmes, Jon Michael Hill as Detective Marcus Bell and Lucy Liu as Joan Watson Photo: Michael Parmelee/CBS © 2015 CBS Broadcasting Inc. All Rights Reserved.