Complex sentence: McGrath has also appeared in films The Throwaways during 2015 as Gloria Miller, in the film McGrath is "The Spy" as described in the trailer who uses "special" tactics to get information.
Split into simpler sentences: McGrath has also appeared in films The Throwaways during 2015 as Gloria Miller. In the film McGrath is "The Spy" as described in the trailer who uses "special" tactics to get information.