After Lynley is reinstated, he tries to catch a crime boss but his star witness is found shot dead on “Masterpiece Theatre: Mystery!” at 8 p.m. Sunday.

A local supermarket manager decides to stand on an Independent ticket at the General Election on back-to-back episodes of “Masterpiece Theatre: The Amazing Mrs. Pritchard” at 9:30 p.m. and 10:30 p.m.

PBS’ convention coverage, anchored by Jim Lehrer of The Newshour, will include extended uninterrupted coverage of podium activities and speeches; reporting from the floor of the convention; newsmaker interviews; political analysis and historical perspective. Convention coverage airs from 7 to 10 p.m. Monday to Thursday.

Ed Slott, an IRA expert, shares strategies viewers can implement to safeguard their retirement savings on “Stay Rich Forever” at 9 p.m. Friday.

America’s favorite malt shop memories are back with this hit collection for lovers only on “My Music: Doo Wop Love Songs” at 6 p.m. Saturday.

Focuses on the years 1965 to 1969 and includes essential ’60s generation folk rock, R&B and pop on “My Music: My Generation The ’60s” at 8 p.m. Saturday.

This never released concert filmed in London in 1977 was the second to the last with Keith Moon on “The Who at Kilburn 1977” at 10 p.m. Saturday.