The crew welcomes aboard Emory Erickson, the inventor of the transporter device, set to conduct a series of experiments to test a radical upgrade to the technology. However, once Enterprise reaches the test site, Archer realizes that his old family friend has lied and is using the ship to search for his son, lost years before in a transporter mishap.

Bill Cobbs (Emory Erickson)
Leslie Silva (Danica Erickson)

Donovan Knowles (Quinn Erickson)
Noel Manzano (Ensign Burrows)
Porthos

• Emory Erickson was a friend of Archer's father; he is like a second father to Archer, who was a friend of Quinn's.
  
• Emory Erickson requires a wheelchair due to a transporter accident. Danica wanted to enlist in Starfleet, but had to take care of her father instead.
  
• T'Pol begins studying the Kir'Shara, which is having a profound effect on all of Vulcan. Phlox verifies that her Pa'nar Syndrome is cured, and notes that others on Vulcan are coming forward to be cured as well.
  
• The crew locates Quinn, but he dies after he is beamed aboard Enterprise.
  
• Ensign Burrows dies when Quinn's energy field touches him.