Original series stars Andy Griffith, Ron Howard, Don Knotts and Jim Nabors reunite for “The Andy Griffith Show Reunion: Back to Mayberry” (7 p.m., CBS). Griffith will narrate and introduce clips from the popular series set in small-town America that ran on Monday nights from 1960 to 1968.

“Andy Griffith” was still the No. 1-rated show when it ended production. Not even “Seinfeld” or “Friends” can say that. Griffith’s genial sheriff character originally appeared in an episode of “The Danny Thomas Show.” “Andy Griffith” would generate its own spin-offs, including “Gomer Pyle, U.S.M.C.,” and “Mayberry, R.F.D.,” starring Ken Berry. This is not the first reunion of the “Andy Griffith Show” cast. The TV movie “Return to Mayberry” aired in April 1986 and became the highest-rated television event of the 1985-86 season.

• What do heroes look like? The documentary “American Valor” (8 p.m., PBS) presents profiles and interviews with dozens of Medal of Honor recipients and veterans of World War II, the Korean War and the Vietnam War.

Each of these men defied enemy fire and extraordinary odds to rescue their fellow soldiers or turn the tide of battle. Almost all of them seem hesitant to discuss their exploits, and many explain that there are plenty of other equally valiant soldiers who either did not survive their mission or performed their extraordinary actions while nobody was watching. Actor and Vietnam veteran Brian Dennehy narrates this frequently moving presentation.

• Other Veterans Day programming includes the “Independent Lens” documentary “Be Good, Smile Pretty” (9:30 p.m., PBS).

Filmmaker Tracy Droz Tragos’ father was killed in Vietnam when she was just a baby. “Pretty” traces her efforts to get to know this young soldier, and to speak for the more than 20,000 other Americans who lost a parent in that war.

• Among Whoopi Goldberg’s more forgettable movies is the 1986 spy flick “Jumpin’ Jack Flash,” which takes its title from a song by the Rolling Stones. At least one Stone holds no hard feelings. Keith Richards makes a rare TV cameo appearance on tonight’s “Whoopi” (7 p.m., NBC). Soft-rocker Phil Collins also appears.

Tonight’s other highlights

• Rory’s harsh ballet review earns the wrath of a dancing fool on “Gilmore Girls” (7 p.m., WB).
• On back-to-back episodes of “24” (Fox), Chase confesses his feelings for Kim (7 p.m.), Palmer mulls the accusations against Anne (8 p.m.).
• Maris becomes a murder suspect on “Frasier” (8:30 p.m., NBC). It’s sad to see a once-great comedy resort to plots so extreme and out of character.
• Diane Sawyer interviews Sgt. Jessica Lynch on “PrimeTime” (8:30 p.m., ABC).
• A return to juvenile court on “Judging Amy” (9 p.m., CBS).

Late night

Madonna appears on “Late Show with David Letterman” (10:35 p.m., CBS) … Jay Leno welcomes Triumph the Insult Dog, Sen. John Kerry and Toby Keith on “The Tonight Show” (10:35 p.m., NBC).