Delphon (language)

Delphon was the language used on Delphon where the inhabitants communicated with their eyebrows. The newly-regenerated Third Doctor warmed up to his new face because he thought its flexibility could be very useful for communicating on Delphon. He then said "How do you do?" in Delphon to Liz Shaw. (TV: Spearhead from Space)

He later told Jo Grant that he learnt how to communicate in Delphon whilst on Alpha Centauri Five. (AUDIO: The Havoc of Empires)

The Seventh Doctor used Delphon to speak to Bernice Summerfield in code. (PROSE: The Trials of Tara)