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Director and writer
Hal Roach averages 6.48, Grover Jones averages 6.81. Apart that suggests 6.65; together they average 5.70, a lift of −0.94.
Lift is the average of their films together minus the mean of their two career averages.
Dot size shows IMDb votes; lines are rolling five-film averages. Films with fewer than 1,000 votes are left out.
| Captain Fury | 1939 | · | 408 | Director | Writer |
| One Million B.C. | 1940 | 5.7 | 1,948 | Director, Producer | Writer |