It's possible:
* The title is incorrect: Double-check the title and year. There may be a spelling error or a slight variation in the title.
* It's a lesser-known production: The production may be a smaller film or documentary with limited online presence.
* It's a live performance: Perhaps "The Circle at the Crossroads" was a live performance by Ross Daly, in which case there wouldn't be a cast list in the traditional sense.
To help you find the information you need, please provide:
* More details: Do you know any other details about the production, like genre, location, or any other names involved?
* The source of your information: Where did you hear about this production?
With more information, I might be able to help you find the cast list.