Katie's least favorite holiday is Valentine's Day, but her desire for a low-key approach is overridden by Greg's over-the-top romantic gestures. Meanwhile Oliver has an expensive gift for the girl he's crushing on, and Taylor tries to put one over on her parents in order to attend a Valentine's Day party.

When a series of corpses with ties to Booth’s former Army unit appear around D.C., Booth must dive into his past to find the killer before the killer finds Booth. Meanwhile, Brennan’s father, Max, hides a serious medical procedure from Brennan, leaving her to grapple with her father’s trust and mortality, as well as her family being in danger.

When Bull has Benny defend a whistle-blowing army analyst, Lt. Tamsin Dale, who is being court martialed, the case causes trust issues between them after Benny won’t share redacted government secrets with the rest of the team. Also, Marissa forces the office to work without its usual technology to avoid being hacked during the case.

When truck and squad are summoned to the scene of a dangerous accident, Chief Boden makes a split-second decision that overrides Chief Anderson, the incident commander whose house was the first to respond to the call. Feeling his authority was undercut and his reputation damaged, Anderson uses his power to make things miserable for Boden and all of House 51 feels the repercussions. Meanwhile, Severide contemplates a major life-changing decision, Herrmann does a good deed and Brett looks to make some personal changes to herself.

In the second elimination challenge of the season, the All-Star teams work to create beautiful snow queens inspired by a series of unique snowflakes.

Mace fights for his life while Coulson and team find themselves in a deadly cat-and-mouse game as they attempt his rescue.

After Abby’s homeland security think tank is compromised and she is found in possession of a real bomb, the NCIS team discovers the leader of the group has been murdered and a theoretical terror playbook has been stolen. Crossover with NCIS: New Orleans season 3 episode 14.

NCIS agents McGee and Torres travel to New Orleans to partner with Pride and his team in the search for a missing homeland security theoretical terror playbook. Crossover with NCIS season 14 episode 15

On Valentine’s Day, Jess tries to convince the gang that she is perfectly content being single. Meanwhile, Schmidt competes for a big promotion and Winston’s proposal plans to Aly are expedited.

Johnny and Stevie pitch a nearby golf course on a package deal with the motel. Moira tries to get out of an invitation to Twyla’s murder mystery party.

Callie awaits her hearing in juvie while Jesus remains in the hospital; Stef and Lena struggle to cope with all of the issues going on in their family.

Frankie and Mike frantically attempt to shut off the water and save some treasured items when the pipes burst in the basement. But after freaking out and bickering amongst each other, Axl, Sue and Brick call a family intervention meeting to let their parents know that their constant fighting and bickering is negatively affecting them. But while the kids feel like they can benefit from their parents’ newfound realization, Frankie and Mike start to think that the kids’ lack of support makes them the ones who should be sorry,

Still reeling from her breakup with Ben, Mindy finds herself living the same day over and over again, and realizes that the only way to break the spell is to make things right with Ben.

Jimmy wants to teach his younger brother the rite of passage of drinking. When Shannon gets a comp hotel room due to a scam she’s pulling, Jimmy thinks this is the perfect time to teach Kenny how to drink, but it all goes awry when Kenny invites Brett to join in. Meanwhile, Eileen discovers that Pat has a new girlfriend, her nemesis, Sheila DeMars,

Episode info coming soon ..

As Kevin stresses about the premiere of his play, he receives support from an unexpected source. Randall struggles under the pressure of both his work and ailing father. Rebecca and Jack's Valentine's Day doesn't go as planned.

Mandy and Milo sit down for a no-holds-barred deep dive on Episode 15, "Jack Pearson's Son."