Citing a Hollywood movie in a scientific paper
I'm coming from a humanities background so there may be some differences in actual citation styles but I think the following would be used by most styles.


Name of movie
Director
Distributor
Year of release
Medium consulted (DVD, VHS etc)
Sometimes the main performers(depending on citation format)


In text styles of course depend on whatever citation style you are using.
I know for example MLA is (Director, Movie Name) and APA is (Director, Year).

For your example of Highlander in the APA style it would be (Mulcahy, 1986) for a inline citation and your reference entry (assumed DVD) would be  - Mulcahy, R. (Director). (1986). Highlander [Motion picture on DVD]. Thorn EMI. 

This Link has a pdf showing examples in MLA, APA and Chicago style.