The Feature Presentation
The hour-long shows of the first two seasons (1955-1957) were divided into quarter-hour blocks, called segments by production designers Bill Walsh and Hal Adelquist. Each of the four segments featured a different form of entertainment that would occur at the same time everyday. This was done both to comply with ABC's network marketing requirements, and to facilitate producing the show's first season. As each segment was independent of the others, they could be filmed in any sequence then assembled into completed shows later by the film editors.
Each segment was a combination of original programming, recycled footage, and advertising.