New filmography credits for TV series are only permitted on a per-episode basis, with a handful of exceptions. In almost all cases, you need to tell us exactly which episodes the person worked on.
If we don't list all of the episodes you want to add credits for, then just use the "Add Episode" button to tell us about them. You can add your credits to the new episode at the same time.
A series-wide credit is permitted if both these conditions are true: you specify a year range (in the character field for cast credits, or the attribute field for crew credits) and we don't currently list any episodes for the start or end year of that range. We would much prefer you to tell us which episodes we're missing.
If some episodes are missing and for any reason it's not feasible for you to tell us about all of them, then you can still tell us the correct year range but you may need to use a combination of episode and series credits to do it.
E.g. if you submit a year range of "(2004-2006)" but we already list a 2006 episode for that series, your credit will be rejected. For your credit to be accepted, you should change it to just "(2004-2005)" and submit your credit separately for the relevant 2006 episode(s). This will result in "(2004-2006)" being displayed in our filmography listings.
This workaround will not give you the correct episode count (e.g. "24 episodes, 2004-2005"). The only way to achieve that is to tell us about each individual episode credit.
If you're submitting a new series title, then series-wide credits are permitted as supporting information. Year ranges are not compulsory in this case, but we still prefer them.
On TV series pages, the credits displayed are an aggregation of all of the episode credits for that series. The number of episode appearances is added up and the original air dates of those episodes combined to create a year range, resulting in a credit like this:
Craig Charles .... Dave Lister (52 episodes, 1988-1999)
Series-level credits are also rolled in. So if we also had a series-level credit for Craig Charles on the same series with a 1991-2001 year range, the year range would be expanded thus:
Craig Charles .... Dave Lister (52 episodes, 1988-2001)
If we *only* had the series-level credit and no episode credits, then the credit would be displayed like this:
Craig Charles .... Dave Lister (unknown episodes, 1991-2001)
Attributes are stripped during aggregation, and episode credits with "archive footage" attributes are excluded altogether.
The "Created by" and "Written by" leaders at the top of TV series pages aren't currently aggregated from episode data. This means that as writer credits are migrated to the individual episodes, these lines will temporarily disappear from the site. We're working to rectify this display problem, but rest assured that the credits are not lost and are still listed on the "full cast and crew" page and on the individual episodes.