(written from a Production point of view)
Ingham played Paris in the 1965 Doctor Who story "The Myth Makers" (which unfortunately no longer exists in the BBC Archives). He is therefore one of the very small number of actors to have appeared in both the Star Trek and Doctor Who franchises. Ingham also played Alydon in the 1965 Peter Cushing Dalek film Dr. Who and the Daleks.
Ingham has also performed a great deal of theater. He is the winner of the Honorary Associate Artist with the Royal Shakespeare Company, Australian Theatre Most Distinguished Actor Award, and the Drama-Logue Award for the Best Performance in a Broadway Musical.