Sheila Franklin

While investigating a massive dust cloud which could cause ecological disaster, an uninvited visitor appears on the bridge. Berlingoff Rasmussen claims to be a historian from the future studying the Enterprise, but when things start to go horribly wrong he refuses to offer constructive advice.

The Enterprise participates in the testing of new propulsion technology but Worf is distracted by a visit from his son Alexander, who intends to make his home on the Enterprise.

A traumatised boy rescued from a wrecked ship is drawn to Data, and Picard attempts to discover the cause of the vessel's destruction.

The Enterprise goes to the rescue of an unknown colony, but is informed that evacuation would destroy the perfection of its genetically engineered society.

While exploring a rare nebula around a neutron star, the Enterprise's safety is threatened by a little girl's imaginary playmate.