Reunites David Duchovny with Lance Henriksen, stars from TV series The X-Files (1993) and Millennium (1996), both created and produced by Chris Carter. Duchovny and Henriksen too met in "Millennium", a special crossover episode between both series.
When the missile is launched, the Phantom apparently is on the surface, but then in the next exterior shot they are maneuvering underwater with no submerging sequence in between.