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Shared credits
Robert Stevenson averages 6.54, William Demarest averages 6.78. Apart that suggests 6.66; together they average 6.45, a lift of −0.21.
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.
| Son of Flubber | 1962 | 6.1 | 3,432 | Director | as Mr. Hummel |
| That Darn Cat! | 1965 | 6.8 | 8,918 | Director | as Mr. MacDougall |