Cast
| Craig Anton | ... | Lloyd Diffy (archive footage) | |
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Jeremy J. Bargiel | ... | Jeremy (archive footage) |
| Shelley Berman | ... | Nobby Frostybump (archive footage) | |
| Ashlie Brillault | ... | Kate Sanders (archive footage) | |
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Geoff Brown | ... | Owner (archive footage) |
| Orlando Brown | ... | Eddie Thomas (archive footage) | |
| Amy Bruckner | ... | Pim Diffy (archive footage) | |
| Corey Burton | ... | Drak-Force One Computer (voice) (archive footage) | |
| Robert Carradine | ... | Sam McGuire (archive footage) | |
| Nancy Cartwright | ... | Rufus (voice) (archive footage) | |
| Gary Cole | ... | Dr. James Timothy Possible (voice) (archive footage) | |
| John DiMaggio | ... | Dr. Drakken (voice) (archive footage) | |
| Kyle Downes | ... | Larry Tudgeman (archive footage) | |
| Haylie Duff | ... | Amy Sanders (archive footage) | |
| Hilary Duff | ... | Lizzie McGuire (archive footage) | |
| Tom Ecobelli | ... | Joe (archive footage) | |
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Shaun Fleming | ... | Tim Possible / Jim Possible (voice) (archive footage) |
| Will Friedle | ... | Ron Stoppable (voice) (archive footage) | |
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Austin W. Glenn | ... | 13-Year-Old (archive footage) |
| Brad Grunberg | ... | Announcer (archive footage) | |
| Edd Hall | ... | TV Announcer (voice) (archive footage) | |
| Margo Harshman | ... | Tawny Dean (archive footage) | |
| T'Keyah Crystal Keymáh | ... | Tanya Baxter (archive footage) | |
| Shia LaBeouf | ... | Louis Stevens (archive footage) | |
| Lalaine | ... | Miranda Sanchez (archive footage) | |
| Adam Lamberg | ... | David 'Gordo' Gordon (archive footage) | |
| Phill Lewis | ... | Mr. Moseby (archive footage) | |
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Allison Lurie | ... | Self (archive footage) (as Fan_3) |
| J.P. Manoux | ... | Curtis / Mr. Hackett (archive footage) | |
| Kyle Massey | ... | Cory Baxter (archive footage) | |
| Aly Michalka | ... | Keely Teslow (archive footage) | |
| Tahj Mowry | ... | Wade Load (voice) (archive footage) | |
| Donna Pescow | ... | Eileen Stevens (archive footage) | |
| Adrian R'Mante | ... | Esteban (archive footage) | |
| Raven-Symoné | ... | Raven Baxter (archive footage) | |
| Debbie Reynolds | ... | Nana Possible (voice) (archive footage) | |
| Kim Rhodes | ... | Carey Martin (archive footage) | |
| Christopher Rodriguez Marquette | ... | Curtis Stevens (archive footage) (as Chris Marquette) | |
| Jackson Rogow | ... | Kid (archive footage) | |
| Christy Carlson Romano | ... | Ren Stevens (archive footage) (as Christy Romano) | |
| Stephen Root | ... | Memphis (voice) (archive footage) | |
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David Rosen | ... | David (archive footage) |
| Ernie Sabella | ... | Mr. Petracelli (archive footage) | |
| Rondell Sheridan | ... | Victor Baxter (archive footage) | |
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Lise Simms | ... | Barbara Diffy (archive footage) |
| Jean Smart | ... | Dr. Ann Possible (voice) (archive footage) | |
| Clayton Snyder | ... | Ethan Craft (archive footage) | |
| Brenda Song | ... | London Tipton (archive footage) | |
| Nick Spano | ... | Donald 'Donnie' Stevens (archive footage) | |
| Cole Sprouse | ... | Cody Martin (archive footage) | |
| Dylan Sprouse | ... | Zack Martin (archive footage) | |
| Brian Stepanek | ... | Arwin (archive footage) | |
| Nicole Sullivan | ... | Shego (voice) (archive footage) | |
| Jake Thomas | ... | Matt McGuire (archive footage) | |
| Ashley Tisdale | ... | Maddie Fitzpatrick (archive footage) | |
| Hallie Todd | ... | Jo McGuire (archive footage) | |
| Lauren Tom | ... | Yoshiko (voice) (archive footage) | |
| Robert Torti | ... | Kurt (archive footage) | |
| A.J. Trauth | ... | Alan Twitty (archive footage) | |
| Minerva Trujillo | ... | Maria (archive footage) | |
| Steven Tyler | ... | Self (archive footage) | |
| Raviv Ullman | ... | Phil Diffy (archive footage) (as Ricky Ullman) | |
| Anneliese van der Pol | ... | Chelsea Daniels (archive footage) | |
| Tom Virtue | ... | Steven Stevens (archive footage) | |
