The doctors gather at Cat's vacation house for her wedding to Michael.
| Name | Type | Role | |
|---|---|---|---|
| David Wain | Writer | ||
| Judah Friedlander | Guest Star | ||
| Justin Kirk | Guest Star | ||
| Annie O'Donnell | Guest Star | ||
| Anne Michael Smith | Guest Star | ||
| Carla Gallo | Guest Star | ||
| 'Weird Al' Yankovic | Guest Star | ||
| Richard Kind | Guest Star | ||
| Ken Marino | Director |