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It's not; only the TV series and movies are.
Paul McGann. He was not in the TV series, but is considered canon since the Seventh Doctor from the series regenerated into him in the 90s American TV movie.
His canon age: 15
It was in 1997, that R Kelly had the hit single Gotham City from the 70's television series Batman and Robin on jive.
They are thinking about many names for a new TV show with Batman. Here is a list of some of the names they have thinked about: The Caped Crusader Gotham Adventures Gotham City Gotham Knight The Batman TV Show Batman 2 (they are maybe going to make a sequel to the Batman series from 1966) Batman: The TV Show Batusi
They did a feature film, Serenity, which took place after the events of Firefly. They also had a comic book series (which is considered canon), 8 written to date.
Gotham - 2012 - TV was released on: USA: 2012
Yes it did, and it is still so today. It has a cult following, and due to the way Fox poorly handled and marketed the series only gave it more notoriety. There is an ongoing comic book series (considered canon) that follows the crew's adventures in between the TV series and the film Serenity, and the events after that flim.
If by that you mean which TV series is considered part of the actual timeline, there's really no right answer for that. The timelines of the two series sort of conflict with one another and the computer animated series has made some events seen in graphic novels, books, etc. no longer canon.
Gotham - 1988 TV is rated/received certificates of: Iceland:12 UK:15 USA:R
Gotham - 1988 - TV was released on: USA: 21 August 1988 Finland: October 1989 (video premiere)
IFP Gotham Awards 2001 - 2001 TV was released on: USA: 11 October 2001