Murtaugh turns to Cole's former mentor, Tom Barnes (guest star Mykelti Williamson), for help on a high-stakes cartel case. Meanwhile, Murtaugh and Trish meet Natalie (guest star Maggie Lawson) and Maya (guest star Shay Rudolph) for the first time, and tensions mount between Bailey and "The Gute" (guest star Paola L�zaro), as the new partners begin to work together