As a few have said, only one person is from a TV series and the rest are from movies.
If a movie like this is done correctly, you don’t need to have watched what came beforehand to appreciate it. Most characters in movies have pasts, we don’t get to watch everyone’s lives from when they are born to when they die.
This most certainly did not happen in my viewing. I am now curious what scene this would have been or if it was just cut out.