Following an encounter with an unknown entity, Counsellor Troi loses her empathetic ability.
This is mediocre episode that has more good aspects than bad, mainly due to some decent performances.
The plot has two distinct threads. It follows Deanna coping with the loss of her powers, whilst it presents a sci-fi angle with the bridge crew dealing with a 2D life form. Neither are particularly memorable but I prefer the scenes involving Deanna.
We see her fall apart after the loss of her powers. It is a bit frustrating to see her character written this way, but other characters who try to help are written well, such as Riker and Guinan. In doing so we have an interesting perspective on the level of control that her ability provide when dealing with people. I also like the notion of her considering her human-half to be inferior.
Visually there is nothing particularly memorable on display, but all performances are strong. Marina Sirtis is very good considering how many temper tantrums she has to throw and how annoying her character is written. Jonathan Frakes, Caryn Johnson, Patrick Stewart, Gates McFadden and Brent Spiner support well.