VOY S4E14 - Message in a Bottle

Voyager finds a network of apparently abandoned satellites that will allow them to communicate with Earth in real time. The catch (and of course there is one) is that the only transmission that would survive the trip is the Doctor's program. The Doctor is sent hurtling across the galaxy and finds himself on the USS Prometheus --- just after it has been hijacked by Romulans. (See what I mean with the catches?) His only ally is this ship's EMH, a cocky Mark II. Can the stalwart holograms save the ship?