Possible Clues:

• Around the South there's increase in code
• Code guy
• TV Oxford cop
• Robert who won a Tony for 'How to Succeed in Business Without Really Trying'
• Barry who played Lt. Gerard on TV's "The Fugitive"
• Walrus - TV detective
• Dot is part of the increase about the South
• Inventor after whom a Yale residential college is named
• "What hath God wrought!" sender
• Means of communication for a TV detective