Thursday, April 21 - Primetime

ABC
8 - Wipeout (repeat)
9 - Grey's Anatomy (repeat)
10 - Private Practice (repeat)

CBS
8 - Big Bang Theory (repeat)
8:30 - Rules of Engagement (repeat)
9 - CSI: Crime Scene Investigation (repeat)
10 - The Mentalist (repeat)

NBC
8 - Community (new)
8:30 - The Paul Reiser Show (new)
9 - The Office (new)
9:30 - Parks & Recreation (new)
10 - 30 Rocks (new)

FOX
8 - American Idol (live)
9 - Bones (new)

Other highlights
8 - The Coverup (made for tv movie)- Lifetime

Sports
7 - NHL Playoffs: Boston Bruins at Montreal Canadiens - Versus
8 - NBA Playoffs: Miami Heat at Philadelphia 76ers - TNT
10 - NHL Playoffs: Teams TBA - Versus
10:30 - NBA Playoffs: Dallas Mavericks at Portland Trailblazers - TNT

Late Night:
Letterman: Steve Martin, Selena Gomez (repeat)
Leno: Bradley Cooper, Rebecca Black and Duran Duran (repeat)
Conan: Reese Witherspoon, Kevin McHale and The Head And The Heart (new)
Kimmel: Christopher Waltz, Jessica Capshaw and Phantogram (new)