Critic's corner

HBO begins a new five-part series (above) about the memory illness. Tonight's episode profiles a group of patients at various stages of the disease.

The Amazing Race 8 p.m., Channel 4

Two teams help each other complete a task, and the final three teams go to Hawaii to hit the finish line in Maui. This is the season finale.

In Plain Sight 10 p.m., USA

A witness is trapped under a collapsed building.

Brothers & Sisters 10 p.m., Channel 5

In the third-season finale, the family goes to Mexico to get Tommy.

The Simpsons 8 p.m., Channel 25

Jodie Foster lends her voice as the adult Maggie.

The No. 1 Ladies' Detective Agency 8 p.m., HBO

The first season wraps.

Cold Case 9 p.m., Channel 4

The conclusion of a two-parter about the 2005 death of a cadet.