![View Poster Image](https://image.tmdb.org/t/p/w342/a5oA3OE4RslcrW8uNPng63wnSdp.jpg)
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![](https://image.tmdb.org/t/p/w92/aqfqXEwhP5VJPgebbyJvyAW3urw.jpg)
Peter Sallis
Wallace (voice)
![](https://image.tmdb.org/t/p/w92/ukGtNrFyiVV21ScQvyeORWCtk5Z.jpg)
Ashley Jensen
Herself - Narrator
![](https://image.tmdb.org/t/p/w92/kIzMwX1R7wBbQytvcz639s1nQGZ.jpg)
John Sparkes
Goronwy (voice)
Jem Stansfield
Himself - Science Correspondent