Here's 557 screencaps from the December 2005 episode of Late Night With Conan when Tina Fey was a guest. Great shots for any Conan or Tina fan.
((Get them here))
Or check out the teasers...
Check this list which is a complete list of everything I have ever screencapped with links to them.
Or just have a look at CapThat Screencaps - the screencap site.