The Two-Dimensional Douglas Neumann Program for calculating the potential flow about bodies of arbitrary shape has been extended to handle lifting, infinite cascades. The resulting very general program allows a wide range of heretofore intractable problems to be solved. Essentially, the program can handle any problem in which the flow pattern repeats indefinitely along an axis. In the Douglas Neumann program this axis is the y-axis. This permits the calculation of the flow about a lifting or nonlifting cascade having any stagger angle and spacing and having arbitrary blade geometry. The program can also calculate the flow about more than one cascade. Thus it can handle the interaction problem of two or more parallel cascades. The Douglas Cascade Program is compared with other theoretical methods, special analytical cases, and experimental data. Program details, among which are input-output format and FORTRAN listing are given in the appendices.