*~*Rach*~*

Another link via Nathan Fillion - Lyndsy Fonseca (Future Daughter) played his daughter on Desperate Housewives and he was in Firefly with Morena Baccarin (Chloe).

Joe Manganiello (Brad) was in Scrubs which stars Sarah Chalke (Stella). He was also in ER with JP Manoux (Not Moby) and Busy Philipps (Rachel in Third Wheel).

Here's a long one for you: Sarah Chalke is in Scrubs with Zach Braff, who was in The Broken Hearts Club with Dean Cain, who was in The New Adventures of Superman in which K Callan (Lily's Grandma Lois) played his mum.

Sarah Chalke is in Scrubs with Zach Braff who used to date Mandy Moore (Amy in Where Were We) and Mandy also guest starred in Scrubs.

Ashley Williams (Victoria) was in an episode of Dawson's Creek with Busy Philipps (Rachel in Third Wheel) and James Van Der Beek (Simon in Sandcastles in the Sand).

James Van Der Beek was in Dawson's Creek with a number of people who shared screen time with Aly in Buffy - Adam Kaufman, Jason Behr, Bianca Lawson...

Danica McKellar (Trudy) was in The Year That Trembled with Meredith Monroe (who starred in Dawson's Creek with JVDB) and Jonathan Woodward (who was in Buffy with Alyson Hannigan and Firefly with Morena Baccarin).