When a landing party is attacked and the victims are found to have been drained of red blood corpuscles, this brings back haunting memories for Kirk who becomes convinced that the culprit is the same mysterious creature that killed his beloved captain and 200 other crew mates on his first deep space mission. Kirk becomes determined to destroy the creature, but what lengths will he go to in order to achieve this?
“Obsession” is clearly inspired by “Moby Dick”, Herman Melville’s 1851 novel, in which Captain Ahab is intent on killing the eponymous sperm whale. We’ve seen a similar storyline with Commodore’s determination to destroy the planet killed in “The Doomsday Machine”, but it is particularly disturbing here to see the usually reliable Kirk so affected, showing a recklessness that results in deaths amongst his crew members and disobeying orders with the effect of putting lives at risk on a colony which need medical supplies. Kirk does some show self-awareness in his log entries, but why couldn’t at least do his other duties first? This all means that it is very difficult to sympathise with Kirk and I was very much siding with Spock and McCoy when it appears that they are going to relieve him of command (although not that they actually go through with anything since Kirk is able to convince them that he is still behaving rationally).
Unfortunately, the fact that Kirk is our main character means that we have some questionable morality on show since he doesn’t really get any comeuppance for his behaviour – on the contrary, he gets some personal growth through learning that he was not responsible for the events that happened previously when having a momentary lapse of concentration before firing a phase at the creature. The episode attempts to explain this through vindicating Kirk’s belief that the creature is intelligent, as well as through it posing a significant threat through giving it the somewhat unlikely ability to fly between random planets at warp speed as well as by suggesting that it is about to reproduce. But I’m still not convinced that all of this was sufficient to justify Kirk’s behaviour, especially as the nature of the creature means that we don’t get to really understand its motivations and therefore there is no evidence for most of what Kirk suggests about it. And after all, it did seem to be Kirk that started the conflict this time when he sends the security team to investigate and then subsequently chased it through space...
There’s a nice attempt to parallel Kirk’s previous actions and the impact that this had on with a young ensign who has just joined the Enterprise crew. Unfortunately, the specifics of the execution of this subplot are just a little too specific to be credible. Not only does this young officer turns out to be the son of the captain of the ship on which Kirk was serving when he encountered the creature, but he also delays firing a phase at the creature in exactly the same way as Kirk had. Stephen Brooks is very likeable as Ensign Garrovick and the character gets an unusual amount of depth for a guest crew member, but I can’t help feeling that there are just too many coincidences going on here…
The end of the episode involves the Enterprise crew coming up with a plan to use anti-matter to kill the creature and, inevitably, it is Kirk and Garrovick who beam down to put this into action. The episode does at least avoid the temptation to have Garrovick sacrifice his life for Kirk or indeed having Kirk trying to do the same for the ensign, but this means that there isn’t much tension to this climax. There is an attempt at further jeopardy as Spock and Scotty struggle to transport Kirk and Garrovick back to the ship, but there is absolutely no doubt that they are not going to solve the problems by pressing a few more buttons.
Theta VII: Location of a colony that is suffering from a medical emergency and is urgently awaiting vaccines that are to be transported there by the Enterprise.
Tycho IV: Where Kirk originally encountered the cloud creature and which appears to have been its home planet.
USS Yorktown: The starship that is schedule to rendezvous with the Enterprise in order to transfer the medical supplies that need to be transported to the Theta VII colony.
“Obsession” is clearly inspired by “Moby Dick”, Herman Melville’s 1851 novel, in which Captain Ahab is intent on killing the eponymous sperm whale. We’ve seen a similar storyline with Commodore’s determination to destroy the planet killed in “The Doomsday Machine”, but it is particularly disturbing here to see the usually reliable Kirk so affected, showing a recklessness that results in deaths amongst his crew members and disobeying orders with the effect of putting lives at risk on a colony which need medical supplies. Kirk does some show self-awareness in his log entries, but why couldn’t at least do his other duties first? This all means that it is very difficult to sympathise with Kirk and I was very much siding with Spock and McCoy when it appears that they are going to relieve him of command (although not that they actually go through with anything since Kirk is able to convince them that he is still behaving rationally).
Unfortunately, the fact that Kirk is our main character means that we have some questionable morality on show since he doesn’t really get any comeuppance for his behaviour – on the contrary, he gets some personal growth through learning that he was not responsible for the events that happened previously when having a momentary lapse of concentration before firing a phase at the creature. The episode attempts to explain this through vindicating Kirk’s belief that the creature is intelligent, as well as through it posing a significant threat through giving it the somewhat unlikely ability to fly between random planets at warp speed as well as by suggesting that it is about to reproduce. But I’m still not convinced that all of this was sufficient to justify Kirk’s behaviour, especially as the nature of the creature means that we don’t get to really understand its motivations and therefore there is no evidence for most of what Kirk suggests about it. And after all, it did seem to be Kirk that started the conflict this time when he sends the security team to investigate and then subsequently chased it through space...
There’s a nice attempt to parallel Kirk’s previous actions and the impact that this had on with a young ensign who has just joined the Enterprise crew. Unfortunately, the specifics of the execution of this subplot are just a little too specific to be credible. Not only does this young officer turns out to be the son of the captain of the ship on which Kirk was serving when he encountered the creature, but he also delays firing a phase at the creature in exactly the same way as Kirk had. Stephen Brooks is very likeable as Ensign Garrovick and the character gets an unusual amount of depth for a guest crew member, but I can’t help feeling that there are just too many coincidences going on here…
The end of the episode involves the Enterprise crew coming up with a plan to use anti-matter to kill the creature and, inevitably, it is Kirk and Garrovick who beam down to put this into action. The episode does at least avoid the temptation to have Garrovick sacrifice his life for Kirk or indeed having Kirk trying to do the same for the ensign, but this means that there isn’t much tension to this climax. There is an attempt at further jeopardy as Spock and Scotty struggle to transport Kirk and Garrovick back to the ship, but there is absolutely no doubt that they are not going to solve the problems by pressing a few more buttons.
Planetary Gazetteer
Argus X: The uninhabited planet on which the Enterprise crew encounter the cloud creature. It is rich in tritanium, a material that is twenty times harder than diamond.Theta VII: Location of a colony that is suffering from a medical emergency and is urgently awaiting vaccines that are to be transported there by the Enterprise.
Tycho IV: Where Kirk originally encountered the cloud creature and which appears to have been its home planet.
Starship Spotting
USS Farragut: The starship on which Kirk served as a lieutenant for his first deep space mission. It was commanded by Captain Garrovick, who was killed by the cloud creature along with approximately 200 other crew members 11 years prior to this episode when they visited Tycho IV.USS Yorktown: The starship that is schedule to rendezvous with the Enterprise in order to transfer the medical supplies that need to be transported to the Theta VII colony.
General Observations
- Three Stardates are given in the episode – 3619.2, 3619.6 and 3620.7.
- George Takei is still away filming “The Green Berets” and so does not appear as Sulu.
- Majel Barrett makes her 9th appearance as Nurse Chappel. She actually gets a nice scene in which she tricks Ensign Garrovick in eating when he is reluctant. Indeed, this is an unusual moment of character building that doesn’t feature any of the entral trio of Kirk,Spock and McCoy.
- This episode features a lot of Red Shirt casualties – Ensign Rizzo and two security officers after the first attack by the creature and then one other in the second attack (two other security officers who survive are named as Henson and Bardoli). One of the early victims is actually named as Mr Leslie, a regular background character played by Eddie Paskey (who was also William Shatner’s stand-in). Despite this, Leslie can be seen later in the episode (and he will go on to appear in some 13 later episodes).
- Jerry Ayres, who here plays Ensign Rizzo, had previously appeared as Ensign O’Herlihy, a similarly ill-fated security officer in “Arena”.
- McCoy uses cordrazine to briefly revive Rizzo; this is the same (fictional) stimulant that the doctor has previously accidentally injected himself with back in “The City On The Edge Of Forever”.
- It is explained that Spock’s blood is green since it is based on copper rather than iron. The episode cleverly exploits this previously established element of Spock’s biology since it makes him immune from the creature’s attack.
- We get a reminder that McCoy isn’t that keen on transporters – something that has been established in "Space Seed" but which hasn’t really yet become a big part of his character.




















