• Gwyn records the stardate as 61886.6 in her personal log.

• ”It’s been a long road.” Gwyn references the lyrics of the Federation anthem.

• In the temple they find at the coordinates provided by the mysterious guide, the Protogies find statues of the Traveler’s species, if they’re not of the Traveler himself.

• The voice of the Traveler can be heard as the Protogies explore the structure. Eric Menyuk reprised the role for this episode.

• The vault door the Protogies discover is modelled on the one in Gary Seven’s office, seen in “Assignment: Earth”, as well as the one Tallinn’s apartment in “Fly Me to the Moon”.

• It’s Wesley Crusher! From Star Trek! Wesley is portrayed by “The Ready Room” host, Wil Wheaton.

    • This is the third time we’ve seen Wesley wearing the orange sweater, which was previously seen in “Where No One Has Gone Before”, and “Lonely Among Us”.

• ”As if I needed another reason to dislike time travel.” In “Future’s End” Janeway claimed, ”Ever since my first day in the job as a Starfleet Captain I swore I'm never let myself get caught in one of these godforsaken paradoxes.”

• ”Edward, I only have three rules when captaining a starship: keep your shirt tucked in, go down with the ship, and never abandon a member of your crew.” Janeway echoes the rules for captaining she said to Naomi Wildman in “Dark Frontier”.

• Rok-Tahk recites Wesley’s resume:

    • Member of Nova Squadron - Wesley was shown to be part of squadron of elite cadets in “The First Duty” when they were under review for getting one of their team killed performing a banned flight maneuver

    • Genius of the Enterprise D - Data might cock his head slightly to one side at this

    • Made acting ensign at age 15 - Wesley was made acting ensign in the sixth TNG episode, “Where No One Has Gone Before”

• “When I was a young man on the Enterprise, I met an advanced being called the Traveler. He was part of a secret faction of explorers who watch over the cosmos. Very cool. The invited me to become one of them.” Wesley is referring to the events of “Where No One Has Gone Before” and “Journey’s End” respectively.

• Wesley lists a variety of different alternate universes:

    • Prime universe - First seen in “Where No Man Has Gone Before”

    • Mirror universe - Introduced in “Mirror, Mirror”

    • The Narada incursion - i.e. the Kelvin timeline established in 2009’s “Star Trek”

    • Fluidic space - Home of Species 8472, seen in “Scorpion, Part II”

    • The mycelial network - A subspace pocket first mentioned in “Context is For Kings”

      • Wesley tells the Protogies that they’re not supposed to know about the mycelial network, apparently respecting the fact that it was classified by Starfleet command in “Such Sweet Sorrow, Part 2”

• ”After the temporal wars, there just aren’t many of us left to repair timelines.” To the best of our knowledge, as per season three of DIS, the temporal wars ended either in the late 31st, or early 32nd century with the establishment of a ban on time travel.

• “My mom lives here!” Also his brother would be around three or four years old at this point, as per “No Win Scenario”, though I agree with Wesley that’s less of a concern.

• ”How do you know about the Supervisors?” The Supervisors were revealed to be agents of the Travelers in “Farewell”.

• Wesley makes it explicitly clear that he was the mysterious figure who was contacting Murf in “Temporal Mechanics 101”

• Wesley transports the Protogies to what appears to be Gary 7’s office as it was seen in “Assignment: Earth”. Presumably in the next episode, we will learn what happened to agents 201 and 347 when Wesley kills them to avoid some messy questions about why he’s there.