This is the first episode where you can notice that Leah Remini is pregnant.
This is the first episode in which Desmond Roberts plays Major Palmer. His older brother Damani Roberts previously played Major.
When Carrie comes out with the turkey, and says "Happy Thanksgiving," the camera pans out, and you can see the end of the stage, as well as the wall, which divides the kitchen from the living room. There's also a water bottle placed there, possibly from a member of the production crew.
Doug gives their address as 3121 Aberdeen
This entire premise is taken from Kiss My Bum (1996), which aired exactly 9 years prior, and where Ellen invites a homeless man to Thanksgiving dinner, and all her guests are uncomfortable. There, they all end up in the hall, to avoid the guest; here, they all end up outside with the transient who had knocked on their door, to use the phone.