Both Alex Zahara (who portrays Warrick Finn), and G. Patrick Currie (who portrays his brother Eamon) play the 2 main Unas characters (Iron Shirt and Chaka) in the previous episode Enemy Mine (2003).
The hangar where the Sebrus is being prepped contains several brightly colored columns with varied rings and stacked discs. Those are not props. The location is a high voltage resonant testing set where large electrical equipment like transformers are tested.
Actor Alex Zahara appears in this episode, he appeared in a total of eight episodes of the series playing nine different characters, more than any other actor in the series. He appeared in the following episodes: Spirits (1998), as Xe'ls; 1969 (1999), as Michael; Foothold (1999), as Alien Leader/Alien #1; Beast of Burden (2001), as Shy One; Metamorphosis (2003), as Eggar, Enemy Mine (2003), as Iron Shirt; Space Race (2003), as Warrick Finn; and Evolution: Part 2 (2003), as Motion Capture Warrior.
The image of the planet Hebridan is an upside down distorted view of Earth, as you can clearly see the Indian peninsula along with Sri Lanka. Also, on the top right corner, you can see the Persian Gulf, which lies between Iran and Saudi Arabia.
G. Patrick Currie, who plays Eamon, is also the actor who plays Fifth, one of the "human" Replicators in Unnatural Selection (2002), New Order: Part 1 (2004), and New Order: Part 2 (2004).