Dowling was a consultant to Steven Spielberg's prop department on the 2002 movie remake of the H. G. Wells book, "The Time Machine". Dowling provided all the equations and figures used in the movie, including those in trailer and all the chalkboards that appeared in the movie.

View Trailer at:

http://timemachine.countingdown.com/flashtrailer.html

While Dowling does not appear in the credits, if you get the DVD and check out the special features, you will hear the prop guys discuss how a "Scientist at JPL" made all the equations for them.

Dowling also consulted for Sony Pictures on another time-travel movie, with the working  title "Frozen", which was never produced.