This question is based on some facts I learned from Peter Davison, who played the Fifth Doctor, at an American Doctor Who convention about thirty years ago. Among the things Davison told the audience was that his second Doctor Who story, "Four to Doomsday" was his least favorite. (His favorite, for comparison, was his last story, "The Caves of Androzani.") One of the reasons he said that he disliked "Four to Doomsday" was that it used a script that was really written for Tom Baker's Fourth Doctor. (This was apparently a problem, in varying degrees, with several Davison's early stories. Many of the scripts in his first season were commissioned before he was cast. But with "Four to Doomsday," which was actually the first Fifth Doctor story to be filmed, the problem was the most severe.)
However, "Four to Doomsday" also includes one of the Fifth Doctor's most iconic scenes. Floating free is space, between the evil Monarch's ship and the TARDIS, the Doctor digs a cricket ball out of his pocket and bounces it off the Monarch's vessel. Catching it again on the rebound, the Doctor is propelled out to the TARDIS. The episode can be seen here at archive.org; the ball scene is at about the 18:00 mark.
This scene, with the cricket ball, was one of the most memorable with Davison's Doctor. At the convention, Davison answered several questions about how it was shot, and he acknowledged that it was the best part of the whole weak story. However, if the script was originally prepared with Tom Baker's Doctor in mind, how did this scene originally play out? Is there any information about how the action would have worked out without the Fifth Doctor's cricket angle?