Returning from a conference via runabout, Picard, Troi, Data and La Forge find the Enterprise and a Romulan Warbird motionless, locked in time — and mid-battle.

Michael Bofshever (Alien Romulan)
Joel Fredericks (Ensign in Engineering)
John DeMita (Romulan in Sickbay)

• This is the first episode to show the aft section of a runabout. (The runabouts were created for Deep Space Nine. They constructed the set using the Next Generation budget to help out DS9.)
  
• The aliens nested their young inside the Warbird engine core's artificial quantum singularity power source. The power transfer caused the temporal fragmentation. (A quantum singularity is a black hole.)
  
• Deanna spent several days on the Romulan Warbird Khazara in the episode "Face of the Enemy".
  
• Deanna is seen "plexing," which she taught Barclay in "Realm of Fear".