In the Lethal Weapon episode “Fools Rush In,” while on the job Riggs (Clayne Crawford) and Murtaugh (Damon Wayans, Sr.) get pulled into the world of conspiracy theories. When not on the job, Murtaugh deals with his wife Trish (Keesha Sharp) who’s trying to get Harper into a fancy pre-school while Riggs’s relationship evolves with Molly Hendricks.
Dr. Cahill is portrayed by Jordana Brewster. The Panamanian-born actress is known for her roles on Secrets and Lies (dead wife Kate Warner), American Crime Story (the late Nicole Brown Simpson’s sister Denise Brown — see link above), Dallas (Elena Ramos), Chuck (Dr. Jill Roberts), and As the World Turns (Nikki Munson), among others. Brewster is also well recognized for her role as Mia Toretto in The Fast & The Furious film franchise. Lethal Weapon airs Tuesdays at 8pm on FOX.