Mars Online

Mark Duplass - Charlie Brownsville, Zoë Simpson Dean - Casey Cook (as Zoe Simpson) , Paul Gordon - Hank Morrison, Cynthia Watros - Allison Guthrie, Michael Dolan - ESA Commander David Jones, Howe Gelb - Shep, Liza Weil - Jewel, James Kochalka - Jackson, Kinky Friedman - President of the United States, Charissa Allen - ESA Environmental Analyst, Elena Araoz - ESA Operations Manager, Nicole Atkins - Casey's Mom, Javier Bonafont - Gepetto the Tailor, Kathy Rose Center - Reporter, Sunhee Cho - ESA Flight Dynamics Engineer