An exemplary computer-implemented media service user interface system detects a request for information about a media program series and, in response, generates a media program series page for the media program series and provides a view of at least a portion of the media program series page for display on a display screen. In certain examples, the system generates the media program series page by determining, across multiple different media content presentation sources by way of which media content is accessible through a media service for presentation by a media content access device, episodes of the media program series that are available for access by the media content access device through the media service, and populating the media program series page with page content that represents the episodes of the media program series that are available for access by the media content access device through the media service.