Today on TV

• Golf (11 a.m., TNT): First round of the PGA Championship

• Veronica Mars (7 p.m., Ch. 2): This is the final repeat episode CBS is airing to promote this UPN show, which airs Wednesday at 9 p.m. on Ch. 24.

• Monk (8 p.m., USA): Monk has reason to believe his wife might not be dead after all.

• Numb3rs (9 p.m., Ch. 2): Ex-"Doogie Howser" Neil Patrick Harris — who's co-starring in CBS's extremely promising new sitcom "How I Met Your Mother" in the fall — guest stars here as a math whiz whose young daughter is kidnapped.