"The Big Bang Theory" 8 p.m. CBS — Penny makes a big step to pursuing a full-time acting career.
"Parks & Recreation" 8:30 p.m. NBC (100th episode) — Leslie faces a big decision over her future as her days in office draw to a close.
"Project Runway All Stars" 9 p.m. Lifetime (third season finale) — The designers showcase their collections at a VIP runway show at the United Nations.
"The Crazy Ones" 9:01 p.m. CBS — Lauren gets her big break with a high-profile client.
"Parenthood" 10 p.m. NBC — Hank has questions after Sarah gets good news about a job.
"Elementary" 10:01 p.m. CBS— A body is found in a barrel.
