Conversation so far:
what was Peter Cook's revival of?
In late 1989, Peter Cook married for the third time, to Malaysian-born property developer Chiew Lin Chong (1945–2016), in Torbay, Devon.
was Peter Cook's revival successful?
Peter Cook's third wife provided him with some stability in his personal life, and he reduced his drinking to the extent that for a time he was teetotal.
what else was interesting about the revival?
Peter Cook lived alone in a small 18th-century house in Perrins Walk, Hampstead, while his wife kept her own property just 100 yards (90 m) away.

Question: what were the four characters?
Self-contained rewrite: what were the four characters Peter Cook appeared as?