Vash comes to the Enterprise for an archaeology conference, but is annoyed Picard has never mentioned her to the crew. Q decides to help, and transforms the Captain and crew into Robin Hood and his Merry Men and Vash into Maid Marian in distress.

John De Lancie ("Q")
Jennifer Hetrick (Vash)
Clive Revill (Sir Guy)
Joi Staton (The Servant)

• After saving her, Vash goes off with Q to explore the galaxy. While Picard won't meet up with Vash again, she does return (along with Q) in the Deep Space Nine episode "Q-Less".
  
• Picard met Vash in the 3rd season episode "Captain's Holiday".
  
• Worf gets to say "I protest! I am not a merry man!"