Here's a running list of PhDs in fictional films who are referred to correctly as Dr. and their specialities.

1. Dr. Indiana Jones; PhD Archaeology
2. Dr. Jack Ryan; PhD Economics or History
3. Dr. Elsa Schneider; PhD Art History
4. Dr. Christmas Jones; PhD Physics

1/

5. Dr. Dr. Chase Meridian; PhD Psychology
6. Dr. Emma Russell; PhD Electrochemistry
7. Dr. Dr. Ellie Sattler; PhD Paleobotany
8. Dr. Ellie Arroway; PhD Astronomy
9. Dr. Charlotte "Charlie" Blackwood; PhD Astrophysics

2/

10. Dr. Bruce Banner; 7 PhDs (this guy needs a hobby)
11. Dr. Strangelove; PhD Physics or Mathematics
12. Dr. Louise Banks; PhD Linguistics
13. Dr. Sarah Harding; PhD Paleontology
14. Dr. Ventress; PhD Psychology

3/

15. Dr. Josie Radek; PhD Physics
16. Dr. Cassie "Cass" Sheppard; PhD Geology
17. Dr. Bunsen Honeydew; PhD Chemistry (probably)
18. Dr. Daniel Jackson; PhD Archaeology
19. Dr. Emmett Brown; PhD Physics

4/

20. Dr. Stanley Goodspeed; PhD Biochemistry
21. Dr. Marta Shearing; PhD Biochemistry
22. Dr. Emilio Lizardo; PhD Physics
23. Dr. Daisuke Serizawa; PhD Paleontology
24. Dr. Peter Venkman; PhDs Psychology and Parapsychology

5/

25. Dr. John Koestler; PhD Astrophysics
26. Dr. Newton Geiszler; 6 PhDs (another guy who needs a hobby)
27. Dr. Jane Foster; PhD Astrophysics
28. Dr. Jonathan Hemlock; PhD Art History
29. Dr. Dave Jennings; PhD English
30. Dr. Julius Kelp; PhD Chemistry

6/

31. Dr. Maurice Phipps; PhD Political Science
32. Dr. Lee; PhD Musicology (presumed)
33. Dr. Vivian bearing; PhD English
34. Dr. Ned Brainard; PhD Chemistry
35. Dr. Robert Langdon; PhD Art History

7/

36. Dr. Ray Stantz; PhD Parapsychology
37. Dr. Egon Spengler; PhD Parapsychology
38. Dr. Goldthwaite Higginson Dorr; PhD Literature
39. Dr. David Gale; PhD Philosophy
40. Dr. Curtis Connors; PhD Physics
41. Dr. Olivia Octavius; PhD Physics

8/

42. Dr. Richard "Dick" Solomon; PhD Physics
43. Dr. Mary Margaret Albright; PhD Anthropology
44. Dr. Ross Geller; PhD Paleontology
45. Dr. Drakken; PhD in something sciency
46. Dr. Amita Ramanujan; PhD Mathematics
47. Dr. Daniel Pierce; PhD Neuroscience

9/

A few trends to note from this list:

First, the majority of these characters are white and straight.

Second, the social sciences are vastly underrepresented. The majority of humanities PhDs are either Art History or English.

Third, there's a lot of physicists...