Scorpion will get a visit from JAG's David James Elliott before the series' freshman season ends.

Ralph Questioned By The CIA On 'Scorpion', Can Walter Protect Him?

Elliott is set to appear in the second half of the season, according to Hollywood Reporter, and he will play a crucial role in uncovering a nuclear terrorist threat.

A former member of the Secret Service, Elliot's Bruce Jones will need Walter O'Brien (Elyes Gabel) and his crew of geniuses to help him remember data from nearly 15 years ago. There's one major problem - Jones was shot in the line of duty, causing him to suffer a heart attack and anoxic brain damage, causing the same adverse memory condition that sidelined Fitz (Iain De Caestecker) from Agents of SHIELD.

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Before Elliott comes into the story, however, Scorpion will need to save one of their own during "Kill Screen." The cyclone's youngest member, Ralph (Riley B. Smith), will find himself in hot water when the CBS drama returns in January. After his dark web game play results in the identification of a CIA safe house and the death of several operatives, the agency will bring the 10 year old in for question.

Find out if Walter and Co. can help Ralph when Scorpion airs Mondays at 9 p.m. ET on CBS. Click the video below to see a preview for the series' latest episode.