Unknown episodes

Once Episodes have been added to a TV Series on IMDb, it is very difficult to add Cast (or Crew) except to specific episodes.

IMDb treats each episode as a separate project in many ways, so  adding only to the Series is, in a rather farfetched way, like saying "I know he acted in a Bond movie, but don't know which one."

That is admittedly a little strained, but it gives the general idea. Also, IMDb is primarily about recording on-screen credits, and a Series obviously  has none, only Episodes do.

You need to try and discover just which episode(s) they were in.

But then how come I've seen several people listed on a Tv series om Imdb without any specific episodes and sometimes even without a role?

Andreas: The people you currently see listed as being in "unknown episodes" were probably submitted to the series as cast members before any episodes were listed -- that is, when the series was originally added to the database, or in some cases before 2006 when IMDb first started listing episode separately. But once episodes start being listed for the series, all future cast members must be submitted to specific episodes.

The issue of cast members being submitted without character names is a completely different story. Suppose you were watching a television episode that, like many television series, listed actor names in the credits but did not indicate what character each actor played. And suppose that you didn't recognize the actors and thus couldn't match them with their character names, nor did you have any way to find out which role was played by each of the actors. You could submit the actors as listed in the episode credits to IMDb, leaving their character names blank, with no problem. IMDb would like to have cast members matched with their character names, but it is perfectly willing to accept cast names without characters listed if the character names are not known.

Ok another question: Sometimes when I add a new person to a tv series or add new information it gets only published on the persons name page but not on the title page for the tv series. How does that come about?