“The Comeback,” which Kudrow created with Michael Patrick King, the “Sex and the City” impresario, premièred in 2005. The first season found Valerie attempting to revive her career in a lame new sitcom called “Room and Bored,” while reality-TV cameras captured her every humiliation. What we see is the raw footage from Valerie’s reality show. Kudrow’s portrayal was unflinching, an early version of cringe comedy. The more Valerie clung to her square inch of fame, the more Hollywood heaped indignities upon her. After auditioning to be one of the “sexy singles” on “Room and Bored,” she’s relegated to playing Aunt Sassy, a dowdy sidekick in a tracksuit. The season peaked with Valerie throwing up while wearing a cupcake costume. The series was a hilariously merciless show-biz sendup, often excruciating to watch. It was cancelled after one season.