Star Trek: Voyager - Season 6 Episode 8 -

Voyager encounters a graviton ellipse, a phenomenon that emerges from subspace on rare occasions. The anomaly engulfed a manned vessel during a Mars mission in 2032 and Chakotay is determined to retrieve the debris from inside the ellipse. Chakotay, Paris and Seven take the Delta Flyer in, but when an asteroid strikes, Chakotay, obsessed with retrieving the module, disobeys Janeway's order to leave. The collision renders the Flyer flightless as the ellipse prepares to return to subspace.