We set the TV show status to Ended only when the show is for very long time discontinued or if there is an official announcement of the show end/cancellation (see the relevant article of our Contribution Bible). According to wikipedia there is still some chance of season 5 being produced, so if we should set this show to Ended, I need you to provide me with a link to some official announcement definitely proving that the show won't continue. Thanks.

I don't think so. From what I've read it seems there has yet to be a conclusive statement that the show has ended. Did you have a source or reason why you think the status should be ended? It's very possible series 4 will be the last of the show, but this is not definitive yet. There have been talk and plans about a 5th season, or at least the possibility of one eventually.

Examples: 1, and 2.

From what I've read it seems there has yet to be a conclusive statement that the show has ended.

There might never be. It's been almost most three years and it looks like there is still no plans for a fifth season. Any other series would be marked as ended by default. I guess we can wait a bit since the break in between seasons is longer than most series but...