Star Trek: Deep Space Nine S06 E14 One Little Ship

"At the edge of the Final Frontier, the Universe's greatest mystery is about to unfold."

Stardate: 51474.2. An attack by the Dominion on Sisko's ship endangers Dax and her crew aboard as she leads them into an anomaly that shrinks them to a very minute size. Unfortunately, they were being held stable by Sisko within a tractor beam, which was discontinued during the attack.