Former JAG star David James Elliott is returning to the network he once called home.

Elliot will guest-star in an upcoming episode of Scorpion, according to The Hollywood Reporter, playing a former Secret Service agent named Bruce Jones. When terrorists threaten to break into a nuclear missile silo, Bruce turns to the Scorpion gang to recover an important, 15-year-old memory.

It’s possible Bruce could become a recurring character.

Ready for more of today’s newsy nuggets? Well…

* Dax Shepard (Parenthood) will pay a second visit to NBC’s About a Boy in the Jan. 13 episode, according to THR. Shepard made his first cameo in Season 1.

* NBC has released promos for Amy Adams’ upcoming turn as Saturday Night Live host. Who knew the Enchanted star was also a One Direction superfan?

* Julian McMahon (Nip/Tuck, Charmed) and Daisy Betts (Chicago Fire) have joined the cast of Syfy’s Childhood’s End, premiering in 2015. Based on Arthur C. Clarke’s novel, the six-hour miniseries finds a group of powerful aliens assuming control of earth, stripping mankind of its culture and identity.

* ABC’s The Great Christmas Light Fight has been renewed for a third season, airing in 2015.

* A&E Network’s Nightwatch will premiere Thursday, Jan. 22, at 10 pm. Produced by Dick Wolf (Law & Order, Chicago Fire), the new reality series follows elite teams of late-night emergency responders in New Orleans.