Kaplan resumed performing stand-up comedy and worked on adaptations of "Welcome Back, Kotter." He still plays poker frequently and became a commentator for poker events and televised poker shows, including the "National Heads-Up Poker Championship" on NBC, "High Stakes Poker" on GSN, and the Intercontinental Poker Championship on CBS. In 1995, his name was mentioned in episode 21, "The PTA Disbands", of the sixth season of "The Simpsons" as a substitute teacher in Bart's class. In 2007, he appeared in Zak Penn's improvisational comedy "The Grand" as Seth Schwartzman, father of brother-and-sister poker players. Also in 2007, Kaplan published a book titled "Kotter's Back: E-mails from a Faded Celebrity to a Bewildered World". In the book, people react to absurd e-mailed claims by Kaplan, such as that he:  The book also describes his e-mails:  In January 2011, GSN announced that Norm Macdonald would replace Kaplan as host of "High Stakes Poker".