During a visit to a former mission site on Nervala IV, Commander Riker encounters his double, the result of a transporter mishap, and learns that the man is still in love with Deanna.

Jonathan Frakes (Lt. W. Thomas Riker)
Dr. Mae Jemison (Transporter Chief Lt. Palmer)

• Riker was a Lieutenant on the U.S.S. Potemkin NCC-18253 during the Nervala IV rescue. He was commended for exceptional valor and promoted to Lieutenant Commander.
  
• The last time Lieutenant Riker saw Deanna Troi was at the Janaran Falls on Betazed. They were supposed to meet on Risa six weeks later.
  
• Lieutenant Riker decides to go by their middle name, Thomas, and transfers to the U.S.S. Gandhi. He will appear again in the DS9 episode "Defiant".
  
• This episode marks LeVar Burton's directorial debut.
  
• Shuttle astronaut Mae Jemison was the first African-American woman in space. She has a brief cameo as Chief Palmer.