Jeff and Adam invent a new game; Timmy and Russell go on a double date.
Langston and Sara turn to Lady Heather for help in tracking down the culprit responsible for injuring a woman before she was seemingly mauled to death by a mountain lion.
Walter and Sylvester enter an international chess competition under cover on foreign soil in an effort to extricate a U.S. spy before her identity is exposed.
Riley's desperation to find the list leads her down a dangerous path, and Evan crosses paths with Riley in her double life.