Big Bang Theory (7 p.m., Ch. 2): Penny agrees to go on a date with Leonard. (Season finale)

Bones (7 p.m., Ch. 13): Everybody at the Jeffersonian is a murder suspect. (Season finale)

Gossip Girl (7 p.m., Ch. 30): Serena tells Dan the truth. (Season finale)

How I Met Your Mother (7:30 p.m., Ch. 2): Ted narrowly escapes death. (Season finale)

House (8 p.m., Ch. 13): House struggles to regain his memory. (Season finale)

Two and a Half Men (8 p.m., Ch. 2): There's trouble when Charlie meets the daughter of the woman he's dating. (Season finale)

The Bachelorette (8:02 p.m., Ch. 4): Two-hour season premiere of this dopey, unreal reality show.

One Tree Hill (8 p.m., Ch. 30): Brooke copes with giving up the baby. (Season finale)

Rules of Engagement (8:30 p.m., Ch. 2): Russell tries to woo a model. (Season finale)

CSI: Miami (9 p.m., Ch. 2): Horatio risks his life to defend the team. (Season finale)