Gary Seven is the major character in the last episode of the second season of the original Star Trek television series, "Assignment: Earth".
It functions as a communication device, a remote control to his personal transporter, a handheld weapon with both stun and kill settings and enough precision to manipulate technology at a distance.
Seven leaves Earth in 1996, after sending Khan on the DY-100 class sleeper ship SS Botany Bay.
Seven died in an initial attempt to rescue Spock from the Devidians, but was pulled from the timeline by the Aegis prior to the moment of his death after Exana (another agent of the Aegis, who was romantically involved with Seven) stopped the Devidians with the aid of Captain Kirk and Captain Picard.
In 2008, IDW Publishing launched an Assignment: Earth comic miniseries written and drawn by John Byrne.