ON WGBH

Mr. Cao Goes to Washington
9 p.m. WGBH (Channel 2) The experiences of Joseph Cao, a first-term congressman and Vietnamese-American elected to represent an historically African American district in New Orleans.

ON CHRONICLE

St. Lucia 7:30 p.m. WCVB-TV (Channel 5) Taking in both the north and south of this Caribbean gem.

RADIO HIGHLIGHTS

Boston Public Radio noon WGBH-FM (89.7)

Radio Boston 3 p.m. WBUR-FM (90.9)

NightSide with Dan Rea 8 p.m. WBZ-AM (1030) Brent Carlson on gun owners’ rights.