Scorpion's youngest member will be in hot water when the CBS drama returns from winter hiatus.

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As much as Paige (Katharine McPhee) works to keep Ralph (Riley B. Smith) and his genius mind occupied, the youngster will find himself replaying one of Walter's (Elyes Gabel) worst childhood moments.

Just as the CIA took in Walter after he hacked NASA, Ralph will be questioned when his use of the dark web accidently leaks the location of a CIA safe house. Unlike Walter, however, Ralph's inadvertent discovery will put blood on his hands.

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After the murder of several CIA agents, the government will want to know just what game the boy genius was playing on the dark web. Walter O'Brien will need to rally his team if they want to keep Paige's son out of trouble.

Titled "Kill Screen," the episode was directed by Jace Alexander (Forever, The Blacklist) and penned by Nicholas Wootton ("Risky Business," "A Cyclone") and Paul Grellong ("Rouge Element," "Plutonium is Forever"). "Kill Screen" will air as the season's 13 episode on Jan. 5.

Scorpion airs Mondays at 9 p.m. ET on CBS. Click the video below to see a preview for the series' latest episode.