The Emergency Medical Hologram's homage to Dr. Leonard McCoy: "I'm a doctor, not a database."
This episode marks the first appearance of the Doctor's mobile emitter allowing him to leave sickbay and even leave the ship.
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.
Rain Robinson claims to have seen "every episode of Mission: Impossible (1966)," a show which prominently featured Star Trek (1966) alum Leonard Nimoy. The original IM show also filmed nearby the original Star Trek series at Paramount. William Shatner and George Takei also made guest appearances on the series.