For every long-running TV show, there's a character that didn't quite work out. Whether the writers found them difficult to write for, the star got the huff and walked, or the audience simply didn't take to them, look hard enough and you'll find an intended main character that faded into the background and was eventually forgotten about.
Sceptical? Then just try watching series one of The Wire again. Here are ten of the best, who you'll find all over certain episodes of their parent shows, but who can't even muster a single Wikipedia entry between them...
Frank Weisel From Yes, Minister
Chief architect of Jim Hacker's rise to MP-dom, cheerfully withstanding repeated attempts to keep him in the dark on account of his knowing far too much about politics for Sir Humphrey's liking. Weisel came to the department's rescue on many occasions, and was once such a key character that he appeared in the original titles, but tricky fourth wheel script status led to his eventual departure for a cushy Butter Mountain-circumnavigating number in Europe, as head of a Quango reporting on Quangos.
Paul, Basil And Rosalie From The Magic Roundabout
Nikki Fernandez From Lost
Brenda From Rising Damp
Knocker-heavy proto-ladette artist's model and the most prominent - she was on the front of the tie-in novel and everything - of Rigsby's infrequently-glimpsed 'other' tenants. Usually to be found threatening (and succeeding) to drink Alan and Philip under the table, or giving off distinct 'look but don't touch' vibes to her lecherous landlord. Mainly only seen in episodes where Frances De La Tour was unavailable, but still there for many classic storylines including the 'Grey Lady' hoax and the Christmas Special.
Mandy Hampton From The West Wing
Catastrophe Kate From Rentaghost
Mr. Dagenham From Camberwick Green
Hana Gitelman From Heroes
The Doctor From Pipkins
Clacky-mouthed lab coat-sporting Anthony Perkins-resembling ventriloquist dummy type who looked after the healthcare side of things at Pipkins. Humanlike appearance may go some way towards explaining why he is less well remembered than Hartley Hare, Topov the Monkey, Octavia the Ostrich, Tortoise the Tortoise and Pig the, erm, Pig. Clearly intended to make youngsters less afraid of their visits to the physician, and presumably in comparison to his grotesque co-stars less afraid of the programme itself.
Kenny From The Tomorrow People