HULU and IMDB!
If you like it, you can also purchase the episode at Amazon (HD link) or the Season 1 DVD. There's no telling how long the show will be online free at HULU and IMDB, so check it out before its gone!
Samantha Who? is a comedy starring Christina Applegate, Jennifer Esposito, Melissa McCarthy, Barry Watson, Tim Russ, Jean Smart, and Kevin Dunn. It aired on ABC for two years about a woman who wakes up from a coma (Christina Applegate) with amnesia.
Samantha Who - Pilot