A girl from Krypton arrives in Smallville to take Clark Kent back to their home planet during the

A girl from Krypton arrives in Smallville to take Clark Kent back to their home planet during the season finale of "Smallville" (8 p.m., The WB).
When Jenifer Estess, a theater and film producer, was diagnosed with amyotrophic lateral sclerosis at age 35, she and her two sisters formed Project A.L.S., a nonprofit organization that has raised millions for research. It's all documented in "Three Sisters: Searching for a Cure" (8 p.m., HBO).
On "The West Wing" (9 p.m., NBC), President Josiah Bartlet (played by Emmy winner Martin Sheen) grapples with some complex situations in the finale of this inside-the-Beltway drama's fifth season.
The group dates are over, and seemingly dozens of roses have been handed out. But at last, we'll know which woman has won Jesse Palmer's heart on "The Bachelor" (9 p.m., ABC). The pressures of calling plays for the New York Giants pale in comparison to Palmer's current task as he chooses the woman who fulfills his romantic dreams.
Although Sarah Michelle Gellar doesn't appear in the series finale of "Angel" (9 p.m., The WB), hopes are high for a rousing end to the vampire saga. Angel (David Boreanaz) and company find themselves locked in the "ultimate battle between good and evil" during a farewell episode that features the return of female bloodsuckers Darla and Drusilla.