| Episode cast overview, first billed only: | |||
| Steve Carell | ... | Michael Scott | |
| Rainn Wilson | ... | Dwight Schrute | |
| John Krasinski | ... | Jim Halpert | |
| Jenna Fischer | ... | Pam Beesly | |
| B.J. Novak | ... | Ryan Howard | |
| Melora Hardin | ... | Jan Levinson (voice) | |
| Leslie David Baker | ... | Stanley Hudson | |
| Brian Baumgartner | ... | Kevin Malone | |
| Kate Flannery | ... | Meredith Palmer | |
| Mindy Kaling | ... | Kelly Kapoor | |
| Angela Kinsey | ... | Angela Martin | |
| Paul Lieberstein | ... | Toby Flenderson | |
| Phyllis Smith | ... | Phyllis Lapin | |
| Creed Bratton | ... | Creed Bratton | |
| Ed Helms | ... | Andy Bernard | |
Jan informs Michael that the Scanton branch of Dunder Mifflin will be merging with the Stamford Branch. Jim and Pam are reunited while the other employees of both branches must adjust to their new co-workers.