"Tail of the Roon Comets" marks the tenth installment of Star Wars: Droids: The Adventures of R2-D2 and C-3PO. This episode was penned by Michael Reaves, drawing from a narrative conceived by Ben Burtt, and brought to life under the direction of Ken Stephenson. Its original broadcast occurred on November 9, 1985 via the ABC network.
On the planet of Manda, Imperial stormtroopers are actively pursuing an escapee. Within a local cantina, Mungo Baobab, along with R2-D2 and C-3PO, are awaiting the arrival of Krox. C-3PO expresses concerns about the safety of their location and is startled by the appearance of a two-headed humanoid male. Mungo assures him that this individual is indeed Krox.
Mungo inquires whether Krox possesses the item he seeks and reminds him of their agreement. Krox, having evaded the Empire, is determined to finalize their transaction. In exchange for a significant coin, Krox hands Mungo a map leading to the Roon system. To C-3PO's dismay, R2-D2 activates a jukebox and begins to dance to the music.
As stormtroopers enter the cantina, Krox makes a hasty exit. Mungo suggests remaining calm, hoping the stormtroopers will overlook them. However, the stormtroopers identify Mungo and announce his arrest under the authority of the Emperor. Artoo utilizes the jukebox to disrupt the stormtroopers' audio amplifiers, enabling himself, Threepio, and Mungo to escape. A stormtrooper retaliates by destroying the jukebox with a Force pike. The stormtrooper leader informs his team that the Emperor desires the map.
Mungo, accompanied by the droids, flees aboard a green landspeeder, making their way to the Baobab Archives. There, R2-D2 projects a hologram of the map. While Mungo examines the holographic map, C-3PO explains that the planet Roon is concealed within a dust cloud known as The Cloak of the Sith. Mungo intends to navigate through the Cloak of the Sith by following the Rainbow comets, leading to the Roon system. C-3PO suggests consulting an Archivist droid, mistaking a statue for the droid.
Startled by the statue, C-3PO stumbles into a pile of datacards and collides with the actual archivist droid. Upon consulting the map, Mungo and the droids locate the astrogation coordinates for the rainbow comets. He instructs R2-D2 to record the coordinates while C-3PO engages in an argument with the archivist droid. C-3PO informs Mungo that he has found the archivist, but R2-D2 reveals that he has already located it. Mungo announces that they are ready to depart.
C-3PO advises Mungo to verify the information with the archivist droid and inquires about the significance of the Roon system. Mungo explains that this expedition will enable him to establish the first trade route for Roonstones. C-3PO expresses reluctance about embarking on another space voyage, but R2-D2 pulls him along. The trio ascends via a turbolift that opens onto the floor.
Meanwhile, the Imperials, under the command of Admiral Terrinald Screed, are exploring the Cloak of the Sith using probe droids to identify planets for conquest. The probe droid returns with Roonstones and a message from Governor Koong of Tawntoom province on Roon. Koong extends a welcome to Admiral Screed and proposes an alliance with the Empire, offering him the Roonstones. When Screed asserts that the Empire will determine their course of action regarding Roon, Koong reveals that the probe droid contains the coordinates. Eager to acquire more Roonstones, Koong instructs his crew to set a course for Roon.
Mungo and the droids follow a rainbow comet through the asteroid field. C-3PO complains about space travel but hopes the Roon system will be painless. R2-D2 beeps a disagreement in binary. Mungo hopes to use the Roonstones to save his father's merchant fleet from ruin. Threepio says he is a bad feeling about this. Mungo thinks the protocol droid is being pessimistic.
Mungo spots the Roon Comets and uses them to guide the ship through the asteroid field towards the Roon system. R2-D2 pilots the ship. Despite his efforts, they are hit by an asteroid, causing the ship's stabilizers to break down. C-3PO for his over-confidence as the ship descends into a radioactive ion cloud. Mungo manages to save them by firing the aft stabilizers into the cloud, allowing them to regain control of the ship. R2-D2 also adjusts the stabilizers so that they can get back on the comet's tail. C-3PO is pessimistic but Mungo is upbeat.
Riding the comet's tail, Mungo and Artoo take the ship towards a planetary system within the dust cloud. Mungo hopes to see new worlds and exploit their wonders. However, they instead encounter a giant space station called the New Umboo Lightstation. Their ship is drawn into the space station by a tractor beam.
Upon disembarking, they are greeted by Governor Koong and his entourage, who apologizes for the tractor beam. He explains that they wanted them to dock without any trouble. Koong mistakes them for Imperial emissaries. Realizing the situation, Mungo claims that they are Imperial observers. Gaff, Koong's aide-de-camp, tries to warn the Governor that Mungo and his droids are not Imperial emissaries but Koong brushes aside his concerns.
Koong takes them on a tour of the station using a grav-cab. They travel through a series of tunnels. C-3PO is disoriented during the journey. Koong shows the guests his gates of Nergon-14, an explosive element sought by many interested parties. Koong also shows Mungo and the droids several captive Mupples within a glass chamber, which he describes as a prized delicacy. C-3PO warns Mungo that Roong and his entourage are pirates.
Meanwhile, R2-D2 inspects the Mupples but one of them grabs him with its tendrils, causing him to fall. Gaff tells R2-D2 to web careful. Mungo agrees with C-3PO but warns that they should not give themselves away. Roong's armored enforcers bring a prisoner named Noop Yeldarb, who used to run the Umboo Lightstation before Koong shut it down and took him captive. A defiant Noop warns that the Empire doesn't rule the Cloak of the Sith region yet.
Shortly later, Admiral Screed arrives aboard a Lambda-class shuttle, blowing Mungo and the droids' cover. They flee into the space station, initially evading Screed and his stormtroopers. The two also avoid a Welding Beetle and a Snic 2-4-2. Mungo reaches a dead end where he is cornered by Gaff, who bests him in combat. Following an argument, C-3PO and R2-D2 head a certain direction but are blocked by stormtroopers, who use their blaster staves to shut down the droids.
The stormtroopers deliver the droids to Admiral Screed. Gaff delivers the unconscious Mungo to Roong and Screed. Screed identifies Mungo Baobab as a representative from the Baobab Merchant Fleet and a fugitive from the Emperor. An apologetic Roong offers Mungo as a gift to the Empire. Screed orders that Mungbo be thrown into a cage with the Mupples.
Gaff reactivates the droids. Screed allows Roong to keep R2-D2 but he orders that C-3PO be reprogrammed. Meanwhile, Noop advises Mungo to handle the Mupples by whistling to them. Knowing that Mungo is opposed to Roong, Noop introduces himself to Mungo. C-3PO is harnessed to the reprogramming machine. Gaff asks C-3PO to suggest a new name to go with his new behavioral circuitry matrix. Threepio initially considers but calls Mungo and R2-D2 for help. R2-D2 struggles against a harness and squeals. Mungo blames himself for landing him and the droids in trouble.
Screed is not impressed with Roong's pirating operation. Roong explains that ever since Gaff shut down the old Umboo Lightstation on his orders, he explains that they have been luring trade ships to destruction with false beacons. Roong hopes to acquire the wealth of the Roong system for himself. Screed reminds him that this plunder belongs to the Empire. C-3PO calls for help. Mungo asks Noop for solutions. Noop points out that they are trapped in their cages.
While pulling a sled, Artoo pretends to blow a circuit and escapes under the cover of smoke, freeing Mungo and Noop by tricking Gaff into firing at the mechanisms holding the energy field within their cages. While R2-D2 leads the stormtroopers and Gaff on a chase, Mungo and Noop rescue Threepio and escape. The stormtroopers open fire on them, causing several crates of Nergon-14 to fall. As the volatile cargo exploits, Gaff warns the stormtroopers not to let the boxes fall on the engines.
R2-D2 pulls a sled carrying Mungo, Noop, and the Mupples towards a tunnel leading to the hangar. While attempting to pursue the fugitives, the stormtroopers allow several crates of Nergon-14 to fall on the engines. This causes the Lightstation's engines to break down, causing the station to drift into the asteroid belt.
Inside the hangar, Mungo throws a barrel into the path of the stormtroopers, causing them to trip on the fuel. Roong tries to reassure Screed that his men will have the situation under control. Gaff advises them to abandon ship. Screed is displeased with Roong's "salvaging" operation. Roong claims it is a minor setback. The Imperials and pirates escape, believing that Baobab and the others were in the station when it exploded.
Mungo and company flee aboard Koong's ship before the station crashes into an asteroid and explodes. Mungo reassures the droids and Noop that even though the pirates have escaped, they have destroyed their operation. The Mupples take a liking to C-3PO and R2-D2. Angered at Governor Koong's incompetence, Admiral Screed throws him and Gaff into the brig. Koong warns that he won't find the Roonstones without him.
Subsequently, Noop expresses gratitude to Mungo and the droids for reinstating him to the Umboo Lightstation. Mungo requests Noop's assistance in locating the Roon system, as they are unable to return to Manda. Noop guides them towards the Roon system. An upbeat Mungo vows to establish a route for the Baobab Merchant Fleet. C-3PO is pessimistic but complies with his master's orders to get the astrogation charts. He is buried under a pile of Mupples.