Flashback (story device)

A flashback is a moment in comics, novels, films, or television episodes that shows events that took place in the past. Several Star Trek episodes have featured flashbacks.

Flashbacks were used in several episodes of Star Trek: The Next Generation and Star Trek: Deep Space Nine.

Orb experiences could also be described as a form of a flashback, such as in.

Clues
Data recounts the events in which the crew was incapacitated. 

Suspicions
Dr. Crusher recounted to Guinan the events that led to her temporarily losing her position on the USS Enterprise (NCC-1701-D). 

Necessary Evil
Odo recounted the events where he first became constable on Terok Nor and met Kira Nerys and Quark in a flashback. He had been asked by Gul Dukat to investigate the murder of Vaatrik, a Bajoran chemist. 

Whispers
The majority of the episode is presented as flashbacks of the experiences of the Replicant O'Brien on Deep Space 9. 

Rules of Engagement
During Worf's trial, the crew recounted the events that led to the destruction of a Klingon civilian transport ship. In the flashbacks, the characters talked directly to the camera, although they are actually talking to Advocate Ch'Pok. 

Hard Time
Flashbacks are used to show Miles O'Brien's time in an Argrathi "prison". These events were all created in his mind by the Argrathi scientists. O'Brien recalls meeting Ee'char, drawing Eseekas and spending many years in the prison. 

Trials and Tribble-Ations
Captain Sisko tells the the Temporal Investigators about the USS Defiant (2370)'s trip back in time and the race to stop Darvin. 

In the Pale Moonlight
Captain Sisko recounted the plan he and Garak used to manipulate the Romulans into declaring war on the Dominion through a series on flashbacks. 

Broken Bow
The episode begins with a flashback of a 9-year-old Jonathan Archer building a model ship with his father, Henry Archer, referring to Ambassador Soval as "Ambasador Pointy". Throughout the episode there are flashbacks of Jonathan learning to fly the model.