Frustrated by a writers' strike which forced it to postpone many of its development plans for the fall season, ABC announced that it will only air one new drama in the fall, David E. Kelley's Life on Mars, a time-travel tale about a police officer w ho is plunged into 1970 America from the current time. ABC will also air the final season of SCRUBS, which was dropped by NBC. It is produced by ABC Studios, formerly Touchstone TV, a corporate sibling of ABC. Also making the lineup for the fall is the new Ashton Kutcher reality series Opportunity Knocks.