An 'I' in your name can make you invisible.

we saw wilson all the time, just not his whole face at once
.
.
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shut up you pedantic **** 

Fat Elvis - Eastenders

Deirdre Birchwood - "Whatever Happened to the Likely Lads".

"Little Hutch" and "Wendy Thwaites" also from WHTTLL

Never been seen:

Charlie - Charlie's Angels
Elizabeth Mainwaring - Captain's wife in Dad's Army
'er Indoors - Arthur's wife in Minder
Joe Maplin - Owner of holiday camp in Hi De hI
Julie - Charlie and Stella's daughter in The League of Gentleman
Maris Crane - Nile's wife in Frasier
Miss Cathcart - Peggy's supervisor in Hi De hi
Monkey Harris - Only Fools And Horses
Mrs Wolowitz - Howard's mother in The Big Bang Theory
Sheridan - Hyacinth Bucket's son in Keeping Up Appearances
The Prime Minister  - in Yes Minister
Wilson - The neighbour in Home Improvement

Any others?
errr...Call me a taxi ?

I've been seen

Beverlie Macca from The Royle Family

I posted here last night, where did it go?

I'll try again...

Cheating facker with Beverly Macca

Father Bigley a shocking ommishun.

Programme?

Invisible Man