B'elanna states that she hasn't seen her father since she was 5. In season 7 she has flashbacks to a camping trip with her father. She was around 10-12 years of age.
At 14:10 Janeway orders soup and spinach juice from the replicator. The style of the glass containing the juice changes from shot to shot.
When Janeway and the Romulan captain are done with the call that she takes in her quarters, he wishes her a "good night." She never mentioned what time it was for Voyager, and the odds that it is a similar time zone in both locations are astronomical.
Capt. Janeway says that it shouldn't take long for the probe Voyager sends through the wormhole to exit. Wormholes are commonly theorized to distort time and space between the two openings, so there would be no telling of when the probe exits the wormhole in question. It could be a few seconds as Janeway insists it will take or a few decades which is as long as the journey to Earth is predicted to be at this point in the series.
When making visual contact with the Romulan ship, Janeway orders Tom Paris to open frequencies and put the transmission on screen. Communications are handled by the tactical officer, not the helmsman.
Harry states that the wormhole is practically microscopic, then says it's 30 centimeters (11.8 inches) in diameter. The microscopic scale is typically considered to be anything under one millimeter in diameter, so practically microscopic would be something say between ten and one millimeters. 30 centimeters is 300 times larger than the microscopic scale, far from close, and as Harry is an extremely brilliant officer when it comes to physics this is not a mistake he would make.
Telek R'Mor originates from 2351, while the Voyager crew is from 2371. According to Star Trek The Next Generation's "Neutral Zone," which took place in 2364, the Federation and the Romulan Empire had not made contact of any sort for 54 years. Telek R'Mor contacting a Starfleet vessel of any kind 13 years before the two sides reestablished contact should have been a much bigger deal to him and the Romulan Empire than it is presented here.
The Voyager crew transports a "test cylinder" to the Romulan ship. The cylinder is shown materializing on the bridge of the Romulan ship, after some difficulty. Transporting to another transporter pad, ie the Romulans' transporter room rather than the bridge, would provide a more stable transporting experience.
Janeway hypothesizes that the wormhole is ancient and has been collapsing for centuries. In Star Trek mythology, wormholes are generally unstable and very temporary. That's what makes the Bajoran wormhole in Deep Space Nine so unique and valuable. There is no evidence that the wormhole Voyager encounters here was ever stable and long-lasting.
Janeway orders soup and spinach juice from the replicator, when, in the previous episode she could not even order a simple coffee for herself without giving a bad example considering the energy shortage the Voyager goes thru.
Telek R'Mor states that, should Voyager find a way back to the Alpha Quadrant, he'd be an old man by then. Romulans are extremely long-lived, living for well over a century, and he appears here to be a man in the prime of his life. The only way he'd be an old man when they returned home is if it took the full 70 years to return home that the Voyager crew originally calculated. It makes no sense for him to assume that he'd be an old man when Voyager returns to the Alpha Quadrant when this story is all about the possibility of a shortcut bringing them home in the very near future.