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Birds of a Feather

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Birds of a Feather
BoaF (93)
General Information
Original broadcast March 23, 2009
Series Ben 10: Alien Force
Season 2
Episode number 23
Overall number 75
Written by Stan Berkowitz
Directed by Dan Riba
Episode Guide
Previous episode Inside Man
Next episode Unearthed
Gallery Cast Errors

Birds of a Feather is the twenty-third episode of Ben 10: Alien Force.


Ben, Gwen and Kevin are surrounded by a large amount of DNAliens near a forest. Ben uses Spidermonkey to fend them off. As Kevin and Gwen have a hard time handling them, a different Spidermonkey, who's assumed to be Ben by Kevin, helps. To their surprise, it fights insanely until Kevin says, "Man, I have never seen you fight like that." Spidermonkey didn't answer, making them realize that it wasn't Ben. Afterwards, his name is revealed to be Simian, and Ben thanks him and wonders what he can do to make it up but Simian wanders back to the forest. While Ben is home wondering about who Simian was, Gwen and Kevin toy around with an acid dispenser dropped by the DNAliens from their battle earlier.

Goop finds Simian again, this time at a factory stealing a piece of scientific equipment. After Goop scolds Simian for being a thief, Ben takes him to a place. There, Simian reveals himself to be the prince of Arachnichimps. Simian needs help in retrieving a crystal which is the symbol of monarchy on his planet. The crystal is being kept in a base on the moon. Ben offers his help but Gwen and Kevin are skeptical. But they are swayed by Ben's argument and decide to go to the moon with Ben and Simian, even though they still don't trust the 'Spidermonkey'.

In the midst of the battle, Ben discovers that Simian has been lying, and that the crystal is actually powering an intergalactic communications station. By stealing it, Simian will prevent Earth, through the Moon, from calling for help against the Highbreed invasion. As Ben faces off against Simian for the crystal, he tricks Simian into stealing the worthless acid dispenser instead, resulting in Simian having a very unpleasant encounter with the Highbreed that employed him, and seemingly gets killed off-screen.

Noteworthy Events

Major Events

Character Debuts

Minor Events

  • Simian mentions his and Spidermonkey's species by name.
  • It is revealed that Big Chill can fly without using his wings and that he can freeze with his hands, which also happens in Singlehanded.



Aliens Used



Simian: Sorry, Ben. I'm leaving here, with the crystal.
Ben: We'll just see what Humungousaur has to say about that!
(Simian webs up the Omnitrix, using it to slam Ben into a wall)
Simian: I don't think Humungousaur has anything to say.

Quotes Right


(Kevin, Ben, and Simian taking off spacesuits)
Kevin: Nice to be out of this monkey-suit. (looks at Simian) Uh... no offense.

Quotes Right


Kevin: Craziest thing we've ever done. And that's saying a lot.
Gwen: Ben identifies with the prince. They've both had a lot of responsibility thrown at them, they're both young.
Kevin: They both get on my nerves.

Quotes Right


Goop: Figured I'd find you here. It's me, Ben! What are you doing?
Simian: I-I need some equipment.
Goop: So, you just decided to take it? That's called stealing!
Simian: Can't be helped.

Quotes Right


Ben: I'm not going alone. I told him I wouldn't go without you two.
Kevin: Great. So where's the fortress?
Ben: (looks up at the sky) On the moon.

Quotes Right


Simian: Ben, I think this guy needs to chill out, what do you think?
Big Chill: I think hate puns and I know I don't like to freeze people.

Quotes Right


Highbreed: Maybe you didn't understand. Maybe you need to have your ears cleaned...

Quotes Right

Naming and Translations

Language Name Origin
French Mon Semblable My Kind
Hungarian Madarat tollával Bird With Its Feather
Portuguese (Br) Diga-me Com Quem Andas Tell Me Who Your Friends Are
Spanish (HA) Ayudando Al Enemigo Helping The Enemy
Spanish (Spain) Tal Para Cual Tit For Tat


  • The title of this episode comes from the saying "Birds of a feather flock together".


  • When Ben turns into Jetray, he doesn't say his name.
  • Ben again shows his martial arts skills, as the majority of the time he fought Simian, he was using hand-to-hand combat rather than transforming into an alien.
  • Spidermonkey has a different transformation sequence.
  • The episode is the third year celebration of Ben 10.
Ben 10: Alien Force Episodes
Season 1
Ben 10 Returns: Part 1Ben 10 Returns: Part 2Everybody Talks About the WeatherKevin's Big ScoreAll That GlittersMax OutPier PressureWhat Are Little Girls Made Of?The GauntletParadoxBe-KnightedPlumbers' HelpersX = Ben + 2
Season 2
Darkstar RisingAlone TogetherGood Copy, Bad CopySave the Last DanceUndercoverPet ProjectGroundedVoidedInside ManBirds of a FeatherUnearthedWar of the Worlds: Part 1War of the Worlds: Part 2
Season 3
Vengeance of Vilgax: Part 1Vengeance of Vilgax: Part 2InfernoFool's GoldSimpleVreedle, VreedleSinglehandedIf All Else FailsIn Charm's WayGhost TownTrade-OffBusy BoxCon of RathPrimusTime HealsThe Secret of ChromastoneAbove and BeyondVendettaThe Final Battle: Part 1The Final Battle: Part 2
Ben 10: Alien Swarm

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