Correcting complex title error

I know how to correct basic errors and the like but no idea how to go about this one.

https://www.imdb.com/title/tt0854862/?ref_=fn_al_tt_1

This title is a stand-alone British film of 1977 called NIGHT FERRY, but somehow it's been listed as an episode of an unrelated American TV series called ONCE UPON A CLASSIC. How can I remove it as an episode and turn it into a stand-alone feature?