When Marshall and Lily receive shocking news, it has a profound effect on the gang and forces them to reexamine their own lives.
Meanwhile, Robin gets a new job, Barney discovers the joy of giving on Christmas and Ted begins his duties as Best Man for his old friend Punchy's wedding.

Russell uses Adam's gift idea to give Adam and friends a surprise at work, Audrey wants to fun to Jeff's party.

After years of begging Mike and Frank to let her go on a pick, Danielle finally gets her chance. The three head out to visit a major collector with a barn full of hidden treasures. Next, Frank agrees to fill in for Danielle at the shop while she hits the road with Mike. In Pennsylvania, they pick the oddball home of two eccentric characters, and Danielle comes up with a winner when she tracks down a century-old hotel that's been vacant for years. Rooms full of furniture and a valuable pinball machine await.

After some medical marijuana dispensaries are robbed the team is led to believe that the case is easy to solve until one of the robberies changes the course of the investigation and gives Brenda a possible chance at moving up in the department.

Charlie pays a visit to Dr. Freeman to help deal with breaking up with Courtney.

Mike has no idea what to buy Molly for their first Christmas together.

Joe attempts to create a strict practice schedule, but it doesn't work out the way he hopes. Meanwhile, Owen tries to establish authority at the car dealership, but being manager is starting to have a strain on his life, especially his marriage, and Terry gets made fun of at work when his coworkers find an old commercial of his on the internet.

It's Christmas in Hawaii, but instead of celebrating, Five-0 is negotiating a hostage situation when the man who killed McGarrett's father resurfaces. The murderer, Victor Hesse, threatens to detonate an explosive that he's strapped to Chin Ho's chest.

Gordon Brown

Conan welcomes actress Gwyneth Paltrow, actor TJ Miller and musical guests Jimmy Eat World. Plus, the arrival of Conan's new Holiday character and Andy promotes his side-project.

Patti Smith

Actor Ricky Gervais; actress Hailee Steinfeld; Diddy-Dirty Money performs.

Mark Wahlberg, Olivia Wilde, Good Charlotte

Ichigo finds himself cornered against Gin's Bankai. But to Ichigo's surprise, Gin advises him to run from this battle. Meanwhile, Urahara, Yoruichi, and Isshin fight Aizen in a three-on-one battle. But none of their attacks appear to work against Aizen.

Connie's father undergoes an operation which proves more difficult than expected. Struggling to deal with his worsening condition, Connie seeks respite in her work. Having completed his surgical rotation on Darwin, Oliver is posted to the AAU. He loses his confidence in theatre and embarrasses himself in front of Michael. Greg is frustrated to be working with Elliot on Darwin, but comes to respect him when Elliot diagnoses an obscure condition. He is shocked to learn of Connie's plan to push Elliot out of his job, and confronts her over her treatment of her former friend.