The agony booth developped by Major Reed and Dr Phlox was originally seen in the TOS episode, "Mirror, Mirror".
	The uniform of the dead Defiant crewmember can briefly, and very faintly, be seen to still the outline of the Enterprise (NCC-1701) delta insignia used on it for DS9's "Trials and Tribble-ations", which has been removed and replaced with the defiant insignia for this episode.
	This episode explains what happened to the 23rd Century's USS Defiant, which disappeared in the TOS episode, "The Tholian Web."

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