attack on a building, early in both episodes
Tucker has the same kind of delta radiation burns as Captain Pike, only less severe
The alien race the Gorn is seen for the first time since Arena
This two part story takes place entirely in the Mirror universe introduced in Mirror Mirror
The Defiant that disappeared in The Tholian Web has crossed into the Mirror Universe about 100 years earlier, the ISS Enterprise is caught in a Tholian Web
The origin of the planet Archer IV is mentioned
Clip of Torpedo being fired is used in the alternate opening credits
A clip of Archer's mirror shelf in a yellow command uniform is shown.