In the teleplay there are fewer transitions from the prison to the
Don Quixote scenes than there are in the musical. The teleplay also includes many adventures from the novel which had to be left out of the musical
Man of La Mancha due to time constraints, such as the attack on the flock of sheep. The encounter with the
windmills, instead of taking place in the early part of the story, as in both Cervantes' novel and the musical, here takes place towards the end. The cynical prisoner known as "The Duke", who plays Dr. Sanson Carrasco in the Don Quixote scenes, is here identified as being British, not Spanish, a fact that places him in considerably more jeopardy with regard to his fate (Spain and England were mortal enemies at the time). In
Man of La Mancha, he is depicted as probably being Spanish. In
I, Don Quixote, he reveals his terror over his possible fate at the end, when, along with Cervantes and the manservant, he is summoned to face the Inquisition; in
Man of La Mancha, only Cervantes and the manservant are summoned at the end, and "The Duke" reacts with no emotion. ==Additional dialogue in the film
Man of La Mancha==