Possible Clues:

• Everybody is in endless rush in US city
• Sarah and boy turned up in US city
• Alien captain unhappy about everyone getting promoted
• '80s soap set in Texas
• Soap named for a city
• Young chap upset girl over scene of assassination
• Mavericks city
• Prime-time soap opera set in Texas
• Neighbor of Fort Worth
• Mysteriously, all sad in the US city