They were created by Dr. PERSON@1 -LRB- the unofficial scientific advisor to the programme -RRB- and PERSON@2 in NUMBER@1 , first appearing in the serial , The Tenth Planet , the last to feature PERSON@3 as the First Doctor .

They were created by Dr. PERSON@1 -LRB- the unofficial scientific advisor to the programme -RRB- and PERSON@2 in NUMBER@1 , first appearing in the serial , The Tenth Planet , which was the last to feature PERSON@3 as the First Doctor .
