"Battlestar Galactica"
Official site features a 10-part online series starring cast members Grace Park and Alessandro Juliani that ran before season 3. The show’s co-creator David Eick has a videoblog.
"24"
Official site features an online talk show about the series called “24 Inside.”
"30 Rock"
Cast members Tina Fey and Tracy Morgan answer viewers’ questions in videos. Kenneth the page (played by Jack McBrayer) has a videoblog.
"90210"
The show’s music supervisor Nic Harcourt has a videoblog on the network’s site. Users can also download songs featured in the show.
"Heroes"
Official site features “Evolutions,” a subsite that includes an interactive comic book, webisodes, links to characters’ sites, a wiki, games, puzzles and other content.
"House"
Official site includes a video memorial and obituary for character Dr. Lawrence Kutner (Kal Penn), who recently died on the show. Fans can also leave messages to the character on a dedicated Facebook page.
"Life on Mars"
Official site features a radio station playing hits from 1973. Also offers trivia and a video game.
"Lost"
ABC.com features behind the scenes videos and cast members answering viewer’s questions. Fans can also upload videos of themselves explaining their “Lost” theories.
"The Office"
Characters Meredith Palmer (Kate Flannery) and Dwight Schrute (Rainn Wilson) have videoblogs on the show’s official site. Users can also subscribe to Twitter tweets from cast members such as Wilson, Mindy Kaling, Melora Hardin, Brian Baumgartner and director Paul Feig.
"Doctor Who"
Official site offers "Tardisodes," 60 second videos including footage not seen in the TV show.
"Ugly Betty"
Official site features webisodes starring characters Marc St. James (Michael Urie) and Amanda Tanen (Becki Newton), a podcast, blogs and a separate site for the show’s magazine, Mode.