9. The Cover-Up
(“March 8, 1983,” season 3 finale)

After a visit to the Soviet Union to meet Elizabeth’s dying mother, Paige cracks under the pressure of keeping such an enormous secret and blurts out to Pastor Tim (Kelly AuCoin) her mentor/father figure at church, that her parents are secretly Russian.

In an effort to protect Martha (and also himself), Philip frames an FBI computer tech for planting the bug in Gaad’s office and then stages the tech’s suicide.