Stardate: 54090.4 - Former members of the Maquis fall victim to a spate of mysterious attacks on board Voyager. Tuvok is placed in charge of the investigations, and soon makes some remarkable discoveries.

Everybody starts to think about their future, and how they are getting into college. Joey's concerned about Pacey not having grades good enough to get into college. Drue makes everybody think it's Jen's birthday so he can make a party. Andie takes over Jack's applications and drives him crazy with her obsession over it. Gretchen is applying for a job as bartender at Mrs. Leery's restaurant, and doesn't exactly tell what happened (or what will happen) with college.

After outdoing Sam on a television program, Bartlet offers to hire Ainsley Hayes, a Republican adviser, as assistant White House counsel, despite being from the Republican party. However, Bartlet's offer shocks the rest of the staff and causes resentment to build. Meanwhile, Toby and Josh attend a summit concerning the cost and availability of AIDS medication in the African countries that need it the most.

Charlie tries to get the mayor to a dentist before an important photo shoot. Caitlin hires a new male assistant only because he's attractive. Carter and Stuart deal with someone who keeps parking a bike in their parking space.

After a woman's body is found in a subway station, a suspect is arrested, but the resulting case concerns the lack of medication supplied him while in prison.

Tonight, Spice Girls Posh & Baby.

Catalina takes Betty to the Rosario Islands to perform a forgiveness ceremony for Armando before returning to Bogotá. Roberto arrives at Ecomoda with the lawyers.

It sometimes seems as if our planet has no secrets left - but deep beneath the great Antarctic ice sheet scientists have made an astonishing discovery. They've found one of the largest lakes in the world. It's very existence defies belief. Scientists are desperate to get into the lake because its extreme environment may be home to unique flora and fauna, never seen before, and NASA are excited by what it could teach us about extraterrestrial life. But 4 kilometers of ice stand between the lake and the surface, and breaking this seal without contaminating the most pristine body of water on the planet is possibly one of the greatest challenges science faces in the 21st century.