Diana confers with an officer named Ensign Daniel - a character she killed in the previous episode The Overlord (1984). (This error appears to be a consequence of the episodes not being broadcast in order of production, however the 2004 DVD release fails to correct this oversight).
When Donovan and Tyler go to the Visitor's Embassy to capture Ghalen they throw him into a van. In the next immediate scene the van does a turn and there's clearly no one in the van's back as the side door is open.
The radio conversation between Mike and Elias. When Donovan radios in and says, 'Shilo, this is Wilderness, come in'. Elias sits at the radio and says, 'go ahead Shilo, this is Wilderness'. He got the names mixed up.