Like parallel universe episodes, episodes involving time travel and other timelines present another ideal opportunity for cameo appearances by actors from other series. This episode includes one such crossover. "Timeless" is a Voyager episode that also made my top 15 time travel list and focuses on a future Harry Kim and Chakotay communicating with a past Voyager in an attempt to keep the ship from crashing and killing everyone else on the crew. As they try to do this, they're pursued by Starfleet, who doesn’t want them meddling with the past, altering the timeline and changing the present.

Who should be the captain of the starship that ends up finding the former Voyager crew but Captain Geordi La Forge! From the starship Challenger, the familiar face from The Next Generation speaks with Chakotay and tries to convince him to talk face to face. La Forge knows what they're trying to do and since they can't let them succeed, he tells Chakotay about an offer from the Federation Council. They can't let him and Kim change the last 15 years and La Forge is thinking of protecting his current crew even if he might be doing the same thing in Chakotay's position. While Chakotay constantly turns him down, La Forge contacts the shuttle again and tells them to lower their shields so they can be beamed out safely when a warp core breach is imminent . Chakotay refuses and just tells him to get to a safe distance.

Even though it's only for a few brief scenes, it's great to see La Forge as a captain here, trying his best to fulfill orders while also understanding where the two Voyager crew members are coming from.