Tony, a thirteen-year-old boy on vacation in rural Germany, is fascinated by the idea of vampires. Meanwhile Rudolph, a vampire of "similar" age (313!), encounters trouble when his clan is threatened by a dangerously obsessed hunter. Fate brings these two boys together, as Tony & Rudolph set off an action-packed battle to stop the villain, save Rudolph's family and learn the power of friendship.
| Actor | Role |
|---|---|
 Rasmus HardikerRudolph Sackville-Bagg / Gregory Sackville-Bagg (voice) | Rudolph Sackville-Bagg / Gregory Sackville-Bagg (voice) |
| AAmy SavilleTony Thompson (voice) | Tony Thompson (voice) |
 Jim CarterRookery (voice) | Rookery (voice) |
 Joseph KloskaManey (voice) | Maney (voice) |
 Phoebe Givron-TaylorAnna Sackville-Bagg (voice) | Anna Sackville-Bagg (voice) |
 Tim Pigott-SmithFrederick Sackville-Bagg (voice) | Frederick Sackville-Bagg (voice) |
 Alice KrigeFreda Sackville-Bagg (voice) | Freda Sackville-Bagg (voice) |
| JJulia RhodesDottie Thomson (voice) | Dottie Thomson (voice) |
 Kevin OttoBob Thompson (voice) | Bob Thompson (voice) |
| DDiane WilsonEmma / Aunt Ashley (voice) | Emma / Aunt Ashley (voice) |
 Graham ClarkeOtto (voice) | Otto (voice) |
 Miriam MargolyesWulftrud (voice) | Wulftrud (voice) |
 Matthew MarshGernot (voice) | Gernot (voice) |
 Matthew Dylan RobertsOld man with dog (voice) | Old man with dog (voice) |