"A Night in Sickbay" was first aired in the United States on the
UPN on October 16, 2002. It received
Nielsen ratings of a 3.9/6 percentage share among all adults, including 6% of all adults watching television at the time of the broadcast. Although overnight figures had shown a slight decrease from the previous episode, the final numbers showed that the ratings were the highest seen so far during season two, and the third week of increased ratings for
Enterprise in succession. This meant that 6.26 million viewers watched the episode, an increase of 860,000 viewers from the previous week's episode, making it the highest viewed episode since season one's "
Sleeping Dogs". Alexander Chase at
USA Today said the numbers "confirm a ratings turnaround for the newest
Trek series". The episode placed
Enterprise fourth in a list of the most highly rated science fiction or fantasy genre shows on television for that week, behind
Alias,
Smallville and
John Doe. Herc of ''
Ain't It Cool News'' rated the episode three out of five, and praised the story about how Porthos was named and the elements of sexual tension between Archer and T'Pol. He thought the
Odd Couple type relationship between Archer and Phlox did not work all the time, that there were too many misfires in the comedic elements, and the episode was repeating things that had already "Been seen done." Michelle Erica Green of
TrekNation, said she enjoyed the episode on the whole and enjoyed the characterisation. She criticised the non-moving Beagle prop as it made her son think the dog was dead, which was then followed by "what looks like a drowned dog in
formaldehyde". Jamahl Epsicokhan of ''
Jammer's Reviews called it "easily the dumbest concept for an episode of Star Trek
since Voyager
holodeck was hijacked by the residents of Fair Haven", and gave it a score of one out of four. He felt that the episode made a mockery out of the characters, and that some of the situations they were placed in were just ridiculous. In his 2022 rewatch, Keith DeCandido of Tor.com'' gave it zero out of ten.
IGN called it "The hands-down worst show of the season".
TechRepublic included the episode on its list of the five worst episodes of
Enterprise.
Star Trek: The Complete Manual published by
SciFiNow listed it as the third worst episode of the series.
Screen Rant ranked "A Night in Sickbay" the 14th worst
Star Trek episode, highlighting what they felt were poor character development choices and a weak plot that revolved around a sick dog (Porthos) that peed on a tree. WhatCulture ranked this episode the 17th worst episode of
Star Trek.
The Digital Fix felt this was a "bad episode", but noted it for experimenting with format.
Den of Geek defended the episode, saying it was flawed, but nowhere near as bad as "
Spock's Brain" or "
Threshold". In 2016,
SyFy included this episode in a group of
Star Trek episodes they felt were commonly disliked, but "deserved a second chance". ==Awards==