The best and worst guest stars on Scrubs

BEST
1. Thomas Cavanaugh
2. Brendan Fraser
3. Michael Learned
4. Dave Foley
5. Glynn Thurman (He was in this season's "My Last Words" and should win this year's Emmy for guest actor in a comedy series.

WORST
1. Keri Russell
2. Courtney Cox
3. Tara Reid
4. Rick Schroeder
5. Michael J. Fox