56th episode american science fiction television series star trek enterprise fourth episode season aired october upn network united_states episode written story idea directed set 22nd century series follows adventures starfleet starship enterprise registration season enterprise features ongoing story following attack earth previously unknown aliens called episode captain crew visit alien seeking formula help protect ship bring board slave called motivations crew initially believe sets built episode including alien filming took longer normal seven days secondary shoots taking additional day half highest rated episode season far million viewers watching broadcast critical reception mixed criticism female sexuality seen reviewers pleased showed sense continuity overall arc described space opera plot meet discuss progress enterprise want attack humans advises continue plan build enterprise sub commander continues help commander tucker vulcan sessions ship seeking formula compound reinforce hull spatial approaches planet vast floating alien captain archer leads away team meet rat chemist met sells formula liquid informs recently visited merchant nearby archer meets merchant tries sell female called archer refuses leaves chases following fight archer away team leave archer promises return home planet later approaches archer quarters puts trance longer remembers visit tucker attempt replicate chemical rat formula attempt fails returns cabin surprised find inside tries resist soon overcome attempts flee quickly captured placed brig archer attempts question lieutenant reed informs ships intercept course admits gathering information running battles crew retrieve ships enterprise attempts pursue enters vortex council discuss development construction new weapon project helped archer data stolen production filming began july primary shooting concluded seven days filming august second unit continued august half day shooting taking place following week filming following episode impulse episode worked joined staff consulting producer previously producer similar genre television series twilight zone directed previously directed episodes voyager fifth episode enterprise season sets built episode including alien chemical laboratory council returned time episode season guest stars appeared members returned included titular character played recently appeared television film written main cast member described saying girl hot word forgot lines couple times appeared rat previously appeared deep space episode sons reception home media release aired october upn received share meaning seen percent households percent households watching television time broadcast translated approximately million viewers highest rated episode season point despite going time season review said pleased continuity seen felt female sexuality seen episode remember trek thought character cliché calling trained comes green described overall plot praised alien set website reviews said demonstrated intention story arc fully fledged space opera thought episode average season wasn good felt scenes reminiscent comic books saying wrong great gave score home media release season dvd box set released united_states september blu ray release enterprise announced early released january
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