The Dropkick Murphys played an extended Live in the Lab set at RadioBDC’s Morrissey Boulevard location. From left: band members Al Barr, Ken Casey, and James Lynch.

All seven members of the band performed on a holiday-themed stage. From left: Matt Kelly, Tim Brennan, Al Barr, Ken Casey, James Lynch, Jeff DaRosa, and Scruffy Wallace.

RadioBDC’s Julie Kramer, left, spoke with singer Ken Casey before the set.

Halfway through the set, members of the band (from left: Brennan, Casey, Lynch, DaRosa, and Wallace) participated in a yankee swap.

The Lab was more packed than ever for a Live in the Lab performance.

From left: Casey, Lynch, and DaRosa. “Signed and Sealed in Blood,” the band’s eighth studio album, will be released Jan. 8.

From left: Barr, Adam 12, Casey, and Lynch, as Adam 12 interviewed the band after its performance.

Adam 12 handed out presents to audience members.

Lynch (left) and DaRosa were flanked by Santas during the set.

Kelley showed off his yankee swap present, a hand puppet, as Brennan prepared to play.

Brennan played accordion while Barr sang and leaned on the piano.

Scruffy Wallace, who plays bagpipes and tin whistle, gave a thumbs up during soundcheck.

The stage setup included a Christmas tree and a piano with the band’s name on it. Milk and cookies were provided to complete the holiday feel.

DaRosa and Wallace performed while two Santas stood behind them. Adam 12 said he stole the one on the left from The Boston Globe’s lobby; Casey said he took the one on the right from The Mighty Mighty Bosstones.

Brennan played piano while Barr and Casey sang.