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Director and writer
Dan Curtis averages 6.03, Sam Hall averages 5.85. Apart that suggests 5.94; together they average 5.85, a lift of −0.09.
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.
| House of Dark Shadows | 1970 | 6.3 | 3,852 | Director, Producer | Writer |
| Night of Dark Shadows | 1971 | 5.4 | 2,037 | Director, Producer, Writer | Writer |