John Behlmann

Alicia and Will deal with their growing sexual tension and Diane and Kurt McVeigh continue their flirtation. At the same time, Alicia defends a college student accused of killing her sorority sister while under the influence of a sleep aid.

Danny and Maria investigate when an expectant mother is a victim of a "knockout game," in which teenagers punch unsuspecting civilians in the head. Meanwhile, Frank wrestles with promoting an officer when he thinks it can be viewed as favoritism.

At Andy's insistence, Jill reluctantly learns to drive with the help of a dreamy instructor, and then takes her road test with a one-of-a-kind DMV agent, Elna (Amy Sedaris). As Brooke's flagship store opening approaches, she must decide whether or not to invite Lex.

While Elizabeth is away on a retreat thinking about her presidential campaign, her staff tries to secure an international agreement to protect citizens who have been displaced due to global warming. Also, the staff works to contain a measles outbreak that threatens the life of Daisy's daughter, Joanna.

Betty (Lili Reinhart) turns to Jughead (Cole Sprouse) for help when the consequences of a hasty decision come back to haunt her. Veronica (Camila Mendes) organizes a face to face meeting after tensions between Hiram (Mark Consuelos), FP (Skeet Ulrich) and Jughead spiral out of control. Elsewhere, Archie (KJ Apa) is forced to make a tough decision after Agent Adams (guest star John Behlmann) takes things one step too far. Madelaine Petsch, Marisol Nichols, Mädchen Amick, Luke Perry, Ashleigh Murray and Casey Cott also star.