Sam's Birthday puts Kiera on the path to an emotional meltdown which triggers an internal diagnostic within Kiera's CMR that forces her to deal with her loss or lose her tech abilities. Meanwhile, Kiera becomes the target of a department mole hunt, when Dillon is ousted and Escher installs Nora Masters as his puppet.

Take an in-depth look at the fifth incarnation of the timeless Time Lord, played by the youngest actor in the part until current Matt Smith.

A prison transfer goes awry and Walt urgently pursues a serial killer and his fellow escapees, who have taken hostages, up a mountain. Facing an impending storm with very limited resources, Walt’s mettle is put to the test and hypothermic hallucinations force him to face his past.

Peggy becomes unsatisfied with her apartment and with Abe, Don has an eventful weekend with Betty while Megan has problems on the set, Roger has time with his grandson, and Pete begins exploring his options outside the firm.