'Dog's Most Wanted': Cancer-stricken Beth Chapman helps capture woman's abusive boyfriend (Exclusive)

Beth Chapman was committed to her job until the end of her life.

In an exclusive sneak peek of the third episode of WGN America's "Dog Most Wanted" available only on AOL, the cancer-stricken reality star helps husband, Duane "Dog" Chapman, nab a woman's abusive boyfriend.

As the stakes build throughout the clip, tensions run high as they get closer and closer to nailing their Alabama-based target as he leaves a bar.

The mission is just one of many that the Chapmans take on in "Dog's Most Wanted," which sees them handpicking names from the FBI, the US Marshalls and every state's "Most Wanted" list," making his own list of criminals he's seeking out. In addition to getting help from his wife, Dog the Bounty Hunter also receives help from his crew called "The Dirty Dozen."

During filming of "Dog's Most Wanted" earlier this year, Beth Chapman was suffering from terminal cancer. She died on June 26 of this year.

Watch the clip at the top of the page and tune into "Dog's Most Wanted" on WGN America, Wednesdays at 9 p.m. EST.