A bewildered Captain Picard finds himself moving back and forth through time. One minute he's aboard the Enterprise, the next, he's twenty-five years in the future, working on his vineyard in France. Then suddenly he finds himself seven years in the past, being escorted aboard the Enterprise for the first time by Lt. Tasha Yar. While his crew suspects Picard of suffering from a debilitating mental disease, Picard struggles to convince them to investigate a temporal anomaly in the Neutral Zone that he believes to be related to his problem. Picard soon discovers that Q is responsible for his erratic time travels. Caught in a paradox that Q has devised, Picard realizes he must risk his life and the lives of his crew to save humanity.

John De Lancie ("Q")
Denise Crosby (Lt. Tasha Yar)
Colm Meaney (Chief Miles O'Brien)
Andreas Katsulas (Commander Tomalok)
Clyde Kusatsu (Admiral Nakamura)
Patti Yasutake (Lt. Alyssa Ogawa)
Pamela Kosh (Jessel)
Tim Kelleher (Lieutenant Gaines)
Alison Brooks (Ensign Nell Chilton)
Stephen Matthew (Ensign Garvin)
Joyce Robinson (Ensign Gates)
Majel Barrett (Computer Voice)

• Two-hour Series Finale. Separated into "All Good Things..., Part I" and "All Good Things..., Part II" for rerun.
  
• Picard took command of the Enterprise on stardate 41148. Encounter at Farpoint takes place on 41153.7.
  
• Lt. Tasha Yar and Chief O'Brien appear in Picard's past, which takes place just before the Farpoint mission. Deanna is also wearing the mini-skirt with boots "Cosmic Cheerleader" outfit. O'Brien is incorrectly wearing Ensign rank and Data is incorrectly wearing Lieutenant Junior Grade rank (unless he was promoted from Lieutenant J.G. to Lieutenant to Lt. Commander between the time he boarded the Enterprise until the pilot episode "Encounter at Farpoint").
  
• Only Data appears in all three time periods, not counting Picard or Q, of course.
  
• In Picard's future, the Klingons have conquered the Romulans and closed their borders to the Federation. Picard is diagnosed with the mental disease Irumodic Syndrome, Captain Beverly Picard is the commanding officer of the medical ship U.S.S. Pasteur, Data is the Dean of Cambridge University, Worf is the governor of the Klingon colony H'Atoria, Deanna is dead, and Admiral Riker is a bitter old commander on Starbase 247.
  
• The present-day Data states that there are 3 tachyon pulses converging at a single point with the same signature as if all 3 originated from the Enterprise. However, the future-pulse originated from the Pasteur not the Enterprise. The 3 tachyon pulses caused the temporal anomaly (an eruption of "anti-time") in the Devron System.