Reality TV production company Mark Burnett Productions and Internet company Yahoo Inc. have signed a multiseason extension to their relationship whereby Yahoo! builds Web sites for versions of “The Apprentice.” The extension will include versions of “The Apprentice” with Donald Trump and with Martha Stewart; the Martha Stewart version begins shooting this month. The agreement also allows for future versions of “The Apprentice” following the 2005-06 television season.

The official Web sites for the fourth and fifth seasons of “The Apprentice” with Donald Trump and the first season of “The Apprentice” with Martha Stewart will include Yahoo!-specific online video, extended versions from each week’s show, games, mobile content for phones, photos, virtual tours and blogs.