Granddad Richards is Derek's grandfather who only appeared in "Grandparents Are Grand!". He was portrayed by Cliff Porter.
In-universe facts[]
- As revealed in the episode "Grandparents Are Grand!":
- He lives in an apartment.
- His son is Derek's father.
- His favorite center in school was the science center (similar to his grandson Derek).
- When he was a little boy, he did not have any television, but listened to the radio often.