Follow-up to 1959's MOUSE THAT ROARED is also based on a Leonard Wibberly novel is mildly amusing in spots. Peter Sellers is gone and the Queen is now played by Margaret Rutherford. This time Grand Fenwick is out to bamboozle both the Soviets and the USA by playing them off against each other over the space race.
Directed by Richard Lester (HARD DAY'S NIGHT), it takes a while before it truly gets off the....er...ground. Once in space it gets funnier. You have German scientists in both the U. S. and USSR giving the Heil Hitler! Salute a full 7 months before Sellers did so in DR. STRANGELOVE. Space trash is already an issue: "Wherever civilization goes, garbage is sure to follow!". On the moon a cosmonaut sneaks off to start constructing something leading to this speculation: "(he's) Building a wall!"
It's all silly fun, but, it's not surprising that this was the end of the Mouse series on screen. (there were three other novels)