"Daedalus" is the name of the eighty-sixth episode from the television series Star Trek: Enterprise and the tenth of the fourth season and first aired on January 14, 2005. The episode takes its title from the Greek mythological figure Daedalus who was the first person who could fly, by constructing artificial wings.
This episode should not be confused with the identically titled Star Trek: Enterprise novel, Daedalus, by Dave Stern, which was published in 2003 and followed by a sequel, Daedalus' Children, in 2004.
The crew welcomes aboard Emory Erickson, the inventor of the transporter device. They set out to conduct a series of experiments to test a radical upgrade to transporter technology.
Emory discusses Sub Quantum Teleportation around a table with Captain Archer. Chief Engineer Tucker assists Emory with the Teleporter upgrade, but after being dismissed by Emory following the successful transporter test, which sent a probe 40,000 km to collect data, the furthest anything has been teleported up to this point, Tucker confides in Archer that many of Emory's upgrades and modifications to the ships power systems were not part of his Transporter test.
A photonic ghost kills a crewman, then reappears. Archer, Commander T'Pol and security engage it and T'Pol gets burned by the ghost, but the scans indicate that it is Emory's son. 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, but agrees to help Emory lock on to his son and reassemble his signal which has been trapped in an empty bubble of quantum space, where the first transporter tests were conducted. His son is recovered, but dies soon after.
In a sub-plot, T'Pol begins to reexamine her Vulcan heritage in the wake of her mother's death.