Make sure that you added precisely E:\TV Shows to your series library.
Not just E:, nor E:\TV Shows\Magum Pi.
Do also verify that you did not enable “Prefer local metadata” in the properties of your library.
Most important for tv shows is the name of the folder.
Yours is missing the comma and the dot after P.
Try this: Change the name of the folder to Magnum, P.I {tvdb-74380}
Then perform the Plex Dance with it.
