The crew tht wrks the morning flight out of EWR will wrk the red eye back, and the crew who wrks the evening flight of EWR will wrk the morning flight back. The crew who wrks the morning flight out of IAH will wrk the red eye back to IAH, the crew who wrks the early evening flight will wrk the early morning flight back to IAH and the crew who wrks the late night flight out of IAH will wrk the afternoon departure back to IAH.