TV series are identified by the year of their broadcast run:
When a show is still running the end year will be omitted:
The end year of a TV show should be the year when the last episode/series finale of the show has aired. In some rare cases, originally unaired episodes of a TV show may be broadcast or released years after the last episode has aired. For the purpose of determining the correct end year of a TV series, those episodes should not be considered.
Make sure to include the title URL, along with the year the correct series ended - if necessary, please also include a link to some evidence to help a member of the team review and update this for you.