For her upcoming 18th birthday, Buffy declines the scooby gang's offer of a big party, hoping to celebrate with quiet reflection and a traditional trip to the ice show with her father. But unbeknownst to Buffy, preparations are being made for a life-threatening rite of passage that drains the slayer of her powers and then entraps her with a powerful vampire foe that she must defeat in a defenseless state in order to pass the test.

After being taunted and pantsed by one of her students, Peggy loses it and spanks him. She is immediately fired, but Cotton and his old buddies start a campaign to get "Paddlin' Peggy" reinstated. Once she is back teaching, Peggy uses her reputation for violence to scare her students, and takes things too far, in true Peggy fashion.

At the height of the Cold War, US subs gathered secrets that neither spies nor satellites could expose. Until recently, almost nobody knew the hidden history of their tragedies and triumphs. As the US strove for supremacy in the Cold War, it pushed submarine technology to its limits. Breakthroughs led to unparalleled triumphs of espionage. And, missteps cost hundreds their lives. With recently declassified film, NOVA lifts the veil on tragic and mysterious submarine accidents and their high-risk spy missions that helped win the Cold War. Along with celebrated oceanographer and explorer, Robert Ballard (discoverer of the Titanic), NOVA goes in search of clues to two tragedies of the Cold War, the wrecks of the nuclear submarines Thresher and Scorpion. Recently declassified footage gives a unique glimpse of the wrecks and a chance to investigate the catastrophic accidents that overtook these subs and their crew.

Tonight, William Baldwin promotes his new movie, Virus.

Two more bizarre murders land on Barnaby's lap, but the discovery of an old school photograph and the grave of an eight-year-old indicates to the Chief Inspector that he should shift his focus away from the redevelopment plans and dig deeper into a dark past.