The contestants are pitted against each other in a caveman movie challenge as Courtney settles in. Heather tries to steal Courtney's hair.
Tropes:
- A Rare Sentence: Harold confesses that he never thought he'd end up saying it, but "[he's] scared of beavers!!!"
- Bad with the Bone: For the second challenge, the Killer Grips and the Screaming Gaffers have to duke it out against each other with bones as their given weapons. Because the Grips won the first challenge, they get bones several times the size of those that the Gaffers get.
- Be Careful What You Wish For: Heather ends up hanging from Beth's bone club above the tar pit. Beth orders her to let go, which Heather automatically responds to by ordering Beth to let go. Beth doesn't have to think twice about complying.
- Blow That Horn: In the prehistoric spirit, Chris uses a huge horn to get the contestants' attention and signal the start of second challenge. However, the horn is so powerful that it knocks Lindsay off her pillar, thereby providing a freebie win for the Screaming Gaffers.
- By the Hair: Heather is bothered that Lindsay still has a full head of hair when she is the reason Heather lost all of hers. An opportunity for some revenge presents itself when Lindsay asks for help getting a knot out. Heather offers and painfully yanks on Lindsay's hair with a brush multiple times until the knot comes out.
- The Cameo: Mr Coconut is seen as an opened coconut that Chris drinks from at the end of the episode.
- Cassandra Truth: Duncan tells Harold he dropped his soap; however, with Harold believing it to be setup for a prank, he ignores Duncan's warning.
- Cheaters Never Prosper: Duncan's cheating in the fire making challenge results in his team losing.
- Continuity Nod:
- Heather mentions that Lindsay is partially responsible for her not having hair.
- The giant beavers previously made appearances as the "Woolly beavers" in the Island episode "Up the Creek".
- The birds that act as Pterodactyls made an appearance in "Camp Castaways", also trying to get their egg back from the contestants.
- Covered in Mud: The contestants have to fight above a tar pit and the loser is decided by who ends up falling into it. Lindsay, Heather, Justin, Harold, and Duncan all get covered in the gooey liquid, but Justin and Lindsay actually like it because its a decent skin care treatment.
- Dumb Blonde: Heather says that she's "too smart" for Lindsay's blonde while discussing whose hair to take.
- Epic Fail: Lindsay manages to lose her fight with Leshawna because the horn Chris used to signal the start of the fight blew her off balance.
- Everyone Has Standards: Chris wanted the contestants to go with the rules on this one, and punished the Gaffers for Duncan's cheating.
- Evil Laugh: Heather gives off a rather silly one after she snipped off a piece of Courtney's hair.
- Freudian Slip: Heather lets slip that she wants Courtney's hair while greeting her in the trailer.
- Groin Attack: How Courtney wins the challenge.
- Laughing Mad: When Heather celebrates getting Courtney's Hair.
- Mistaken for Cheating: Courtney assumes that Gwen and Duncan were dating, even though they actually weren't.
- Pet the Dog:
- Justin willingly helps Lindsay out of the tar pit, with seemingly no ill intent afterwards.
- When Harold is first chased by the beavers, Duncan does ask in a worried tone if they are animatronic, and not real monsters. They actually are the real thing, but Chris lies to him.
- Pop-Culture Pun Episode Title: The title is a play on the film One Million Years B.C.
- Sanity Slippage: Heather appears to have one when she snips Courtney's hair.Heather: I'm not crazy, just bald.
- Self-Deprecation: When Lindsay discusses that there's no need for more than one know-it-all in the cast, she says that she was referring to herself.
- Shout-Out:
- Heather's wig and Beth's loincloth are based on Pebbles from The Flintstones. Other references include the giant ribs tied to the top of a golf cart that make it fall on its side and Chef's line, "Eh, it's a living".
- Heather calls the prehistoric goose that takes her wig Tweety.
- Chris ends the episode with "Same Chris-Time, Same Chris-Channel!".
- Signature Scene: In-Universe. Justin thinks the shot of him on the pillar will become one of these.
- Slap-Slap-Kiss: Duncan and Courtney's interactions in this episode are this.
- Slippery Soap: Harold returns to his trailer fresh from a shower. He drops the soap he's holding, which Duncan warns him about, but Harold thinks the bully is playing a prank, keeps walking, and slips on the soap. Duncan and Justin have a laugh until Harold confronts them butt-naked and in no hurry to put his Modesty Towel back on.
- Stock Femur Bone: The bones the Killer Grips and the Screaming Gaffers need to fight with are your standard femur bones in different sizes.
- Sure, Let's Go with That: The giant beavers and pterodactyls are very much real (pterodactyls being huge geese), but the contestants simply think that they're imagery or animatronics, which Chris goes along with.
- Tempting Fate: Several:
- Courtney complains that nobody can make a fire out of the rocks they were given, only for Lindsay to immediately do just that.
- Duncan tells Harold that the beavers can't swim through tar. Cue said beavers doing exactly that.
- Duncan also assures Harold that the beavers are harmless since the pillars are plaster not wood, and that beavers can't climb. Seconds later, one beaver is biting at the pillar and the other is climbing it.Duncan: I guess my knowledge of prehistoric beavers is a little rusty.
- What Happened to the Mouse?: Justin disappears during the fire-making challenge.
