I was watching Columbo the other day, where his wife is often mentioned but never seen.
It occurred to me that there are other programmes where a character is never seen. Others that come to mind are Arthur Daley`s wife in Minder and Sheridan, the son in Keeping Up Appearances.
Are there any others, and what sort of actor would be cast in such parts if they were seen, or how do you imagine they would be like.
I imagine Arthur Daley`s wife with a headscarf and housecoat,
Mrs Columbo would be rather prim and proper
Sheridan, a young, camp Graham Norton type
OOhhh blimey i do remember Dick Emery,,, when younger i used to do the " You are awful but i like you" at my brother and it used to really used to make him and me crack up laughing!!!!!!!!!!!!!!!. He was very funny.
Nile's wife in Frasier
Meris? Maris?
she was portrayed as such a delicate thing
when you saw Frasiers wife, she wasnt a substantial woman either
so Meris/Maris must have been invisible
in fact she was 
Norms wife on cheers, vera
he had a few funny stories about her but she was never shown
and there was a childrens show, with tim allen
the neighbour, Wilson
you only saw his hat or eyes
never his full face
kinda creepy having a neighbour peer over your fence talking to your children but you dont know what he looks like 
And the next door neighbours mother in One Foot in the Grave.
So obviously camp that no-one would ever say he was straight.
Except his mother
