Better Living Through Chemistry

Summary

Murtaugh and Riggs respond to the murder of an escaped patient of Dr. Cahill's who mysteriously goes off the rails. Riggs' anger gets the better of him once again, causing Avery to consider whether or not he is fit to serve. Family tension runs high between Murtaugh and Trish, who have to make big decisions about R.J.

Guest stars

• Dante Brown as Roger Murtaugh, Jr.
• Matt Malloy as Dr. Samuels
• Kelly Coffield Park as Peggy
• Craig Gellis as Carl Edwards
• Chase Mangum as Young Nathan Riggs
• Michelle Hurd as Gina Santos
• George Ketsios as Alan
• Luis Jose Lopez as Stanley Oliver
• Gabriel Nunez as Jose
• James Bane as Orderly