Robert Donner and John Mitchum made 4 films together, and the 3 rated ones average 7.09, 0.70 above their career marks. The best is El Dorado at 7.4.

Robert Donner averages 6.04, John Mitchum averages 6.73. Apart that suggests 6.39; together they average 7.09, a lift of +0.70.

Lift is the average of their films together minus the mean of their two career averages.