This episode marks the first appearance of the Doctor's mobile emitter allowing him to leave sickbay and even leave the ship.

The Emergency Medical Hologram's homage to Dr. Leonard McCoy: "I'm a doctor, not a database."

Starling says that what's good for Chronowerx is good for everybody. In 1953 the CEO of General Motors said that what is good for the country is good for GM, and vice versa. That line has entered popular useage as "What's good for GM is good for the country" as the ultimate expression of corporate arrogance.

Before returning to the 24th century, Voyager leaves some technology behind, including Captain Janeway's combadge, her tricorder, and The Doctor's holographic combadge. In Relativity (1999) it is revealed that they also left a version of Captain Braxton behind.

Along with Assignment: Earth (1968), Star Trek IV: The Voyage Home (1986) and Future's End (1996), this is one of only four "Star Trek" productions that take place (at least partially) in the year in which it was actually released.