THE ANTARES CREW REALIZE THE GALAXY ISN'T THE ONLY THING THEY'LL BE NAVIGATING, ON ABC'S "DEFYING GRAVITY"

"Threshold" � The crew is turning up the heat, on ABC's "Defying Gravity," SUNDAY, AUGUST 9 (10:00-11:00 p.m., ET). Taboos are broken and lines are crossed as personal and professional relationships aboard the Antares and on Earth continue to intensify, while the unseen power behind the mission begins to create both cellular and psychological transformations among the astronauts.

"Threshold" was directed by Peter Howitt and written by Sheri Elwood.

"Defying Gravity" stars Ron Livingston as Maddux Donner, Laura Harris as Zoe Barnes, Malik Yoba as Ted Shaw, Christina Cox as Jen Crane, Florentine Lahme as Nadia Schilling, Paula Garces as Paula Morales, Eyal Podell as Evram Mintz, Dylan Taylor as Steve Wassenfelder, Andrew Airlie as Mike Goss, Karen LeBlanc as Eve Shaw, Zahf Paroo as Ajay Sharma and Maxim Roy as Claire Dereux.

The series' executive producers are James Parriott, Michael Edelstein, Brian Hamilton and Michael Chechik. "Defying Gravity" is a co-venture between Fox Television Studios and Omni Film Productions and is produced in association with Canada's CTV and Germany's ProSieben.

"Defying Gravity" is broadcast with Spanish subtitles via secondary closed captioning. This program carries a TV-14,D,L,S parental guideline.

For more information on "Defying Gravity," visit ABC.com.