Showtime’s new hourlong series about the ‘70s LA standup scene doesn’t premiere on TV until next month, but the network released the pilot episode online this week so you can get a head start. Ordered to series last year, the Jim Carrey-produced I’m Dying Up Here is based on the 2009 book by William Knoedelseder and has a huge ensemble cast including Melissa Leo, Ari Graynor, Clark Duke, Michael Angarano, RJ Cyler, Erik Griffin, and Stephen Guarino, and the pilot includes appearances from Alfred Molina, Sebastian Stan, Robert Forster, Jon Daly, Al Madrigal, Brianne Howey, Ginger Gonzaga, and Cathy Moriarty. Check out the full pilot episode above – it’s got everything from Tonight Show standup sets (with Dylan Baker as Johnny Carson) to struggling LA comedy newbies sleeping next to litter boxes to a tragic death that sets the show in motion. The series officially premieres on Showtime Sunday, June 4th at 10:00pm.