3. The series creators have said that the
Clangers, living in vacuum, did not actually
communicate by sound, but rather by a
type of nuclear magnetic resonance,
which was translated to audible whistles
for the human audience. These whistles
followed the rhythm and intonation of a
script in the English language, including
swear-words.
http://en.wikipedia.org/wiki/The_Clangers
4. the robots want
to help, but they
can’t understand
http://flickr.com/photos/donsolo/2385041554/