| Episode Name |
Season and Number |
Description |
| "Haven" |
1.10 |
Troi is expected to enter into an arranged marriage. This is the first of 6 appearances by Majel Barrett-Roddenberry as Lwaxana Troi. |
| "The Child" |
2.1 |
An alien presence invades Troi's body and she gives birth to a son. |
| "The Price" |
3.8 |
Troi begins a romance with a mysterious negotiator who holds a secret. |
| "Ménage à Troi" |
3.24 |
Deanna, Will Riker and Lwaxana are kidnapped by the Ferengi after a trip to Betazed (the only time we see Troi's home planet). |
| "The Loss" |
4.10 |
Troi loses her empathic abilities when the Enterprise encounters two-dimensional beings. |
| "Disaster" |
5.5 |
In a disaster movie style episode, Troi is the senior officer on the Bridge and must take command. |
| "The Masterpiece Society" |
5.13 |
When a genetically modified society reluctantly accepts the Enterprise's help, Troi has an ill-advised romance. |
| "Power Play" |
5.15 |
In this "Demonic Deanna episode", spirits from a prison colony invade Troi, Data and O'Brien on an away mission. |
| "Man of the People" |
6.3 |
Another "Demonic Deanna episode": an Ambassador takes advantage of Troi, transmitting all his negative emotion towards her causing her to behave very differently and age rapidly. |
| "Face of the Enemy" |
6.14 |
Troi is kidnapped and surgically altered to pose as a Romulan. |
| "Second Chances" |
6.24 |
When a duplicate of Will Riker is discovered, Troi is put in a difficult position and revisits her romance with him. |
| "Dark Page" |
7.7 |
When Lwaxana slips into a deep coma, Deanna must enter her mind to discover secrets of the past. |
| "Thine Own Self" |
7.16 |
As the secondary plot of this episode, Troi decides to take the bridge officer's test to become a full Commander. |
| "Eye of the Beholder" |
7.18 |
Troi experiences a few days' events in a few seconds, in which she has a romance with and kills Worf. |
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