In a recent post, I indicated that Emily Mortimer would be providing the voice for an as-yet-unnamed character. My source for that information appears to have been incorrect.
The aforementioned unnamed character is actually the evil villain “Professor Z” and will be voiced by Thomas Kretschmann
Joe Mantegna will be supplying the voice of Grem
Peter Jacobson as Acer
…and to introduce at least some new information, Jason Isaacs will be supplying the voice of Siddeley, a sleek spyplane