In this episode , Monica Reyes ( Annabeth Gish ) enlists Mulder 's help investigating a killer 's connection to the unsolved murder of Doggett 's son .
Mulder soon finds himself clashing with Doggett .
In this episode , Monica Reyes ( Annabeth Gish ) enlists Mulder 's help investigating a killer 's connection to the unsolved murder of Doggett 's son , but Mulder soon finds himself clashing with Doggett .