MaryAnn Hu

Sherlock and Joan search for a murderer who used poisonous mushrooms to kill a botany professor and a group of the instructor's students. Also, when Joan is disturbed by loud noise next door, she discovers her neighbor, Trent (Richard Kind), is renting out his home through a vacation site that caters to hard pratiers.

Elizabeth must take the oath of office when the President's plane disappears over the Pacific Ocean. Also, Henry is asked to recruit one of his Russian students to work for the U.S. government by Jane Fellows (Jill Hennessy), his new Defense Intelligence Agency handler. Academy Award winner and Executive Producer Morgan Freeman directed the episode and guest stars as Chief Justice Frawley.

Kevin interrupts Jackie and Frank's night. Akalitus' blood results are in. Zoey helps Prentiss organize his disaster of an office. Jackie is convinced that Grace is sneaking behind her back to see Danny. Frank urges Jackie to work on her issues.