In the next all-new episode of "Criminal Minds," the BAU agents track down a psychotic killer mother-and-son duo of serial killers.

A preview of Wednesday night's episode, entitled "The Bond," shows a mother who seems to encourage her son to murder people.

"Mother will love and accept you no matter what," the mom tells her son in the trailer, right before he closes a car trunk with a woman tied up inside of it.

At another point in the video, Dr. Tara Lewis (Aisha Tyler) says, "The Unsub is killing victims off a list."

According to The Hollywood Hills, the synopsis for the episode states that, "The BAU is going to search for a motive and an UnSub when victims are found in truck stop restrooms along highways throughout the South."

Meanwhile, "Grumpy Cat" star Aubrey Plaza revealed that she might reprise her role as Cat Adams once again later on in the season. Plaza guest starred during the show's midseason premiere as Dr. Spencer Reid's (Matthew Gray Gubler) delusional and dangerous blind date.

The date took a dramatic turn when Cat threatened to kill Reid and dozens of innocent people inside of a restaurant as a sort of surprise mind game. Fortunately, the BAU was able to detonate a bomb she planted and foil her plot before innocent lives were lost.

During an interview with TVLine, Plaza hinted that Cat might make another appearance on the show to handle unfinished business with Reid.

"For me, it was a love story," the actress said. "And I don't think it's over. I think you're going to see Spencer visiting me in jail, Hannibal Lecter style. I can't speak for the writers or the producers, but I told them that this is not over. These people are soul mates." 

Season 11, Episode 13 of "Criminal Minds," "The Bond," will premiere on Wednesday, Jan. 27 at 9 p.m. ET on CBS.

Watch a preview video below.