Broadway previews started with a performance on Wednesday evening, October 2, 1968. The matinee on the following Wednesday was canceled when star Richard Kiley was unable to perform due to illness. Co-star Leslie Uggams also missed a preview performance due to illness — the Saturday matinee on October 19 — but her understudy went on.
Some online sources list a total of 21 Broadway previews, but the correct total is 20. During the first week, there were 5; during the second week, there were 7 (due to the canceled performance); and there were 8 during the final week.