De or het reportageserie?

The correct Dutch article is:

de reportageserie

How to use reportageserie

the reportageseriede reportageserie
this reportageseriedeze reportageserie
that reportageseriedie reportageserie
our reportageserieonze reportageserie
your reportageseriejouw reportageserie
every reportageserieelke reportageserie
which reportageserie?welke reportageserie?
a big reportageserie / the big reportageserieeen grote reportageserie, de grote reportageserie