Marge Simpson, Patty Bouvier, and Selma Bouvier
Mr. Burns, Ned Flanders, Principal Skinner, Waylon Smithers, Kent Brockman, and others
Homer Simpson, Grampa Simpson, Barney Gumble, Krusty the Clown, Groundskeeper Willie, and others
Bart Simpson, Nelson Muntz, Ralph Wiggum, Todd Flanders, and others
Apu Nahasapeemapetilon, Moe Szyslak, Chief Wiggum, Comic Book Guy, Lou, and others
Santa's Little Helper and Additional Animal Voices
Agnes Skinner, Brandine Del Roy, Dolph and others
Billboards the Simpsons pass on the way from the airport read "Hail President Muntu", "Muntu Means Progress, and "Muntu Builds Stadiums".
Bart has a green tongue while eating the grubs and a minute later he doesn't!
Dr. Bushwell: Everyday, I get up at 5:30, watch the chimps, eat a quick lunch of roots and water, then more chimp-watching. After dark, I come home and think about chimps until it's time for bed.
Homer: You must be the most boring woman on earth.
Dr. Bushwell: Possibly, but...
Homer: I mean, I knew scientists wasted their lives, but geez!
Homer: (Searching through the cupboards) "Sulpher Jerky"? "Cream of toast"? Where did we get this crap?
Marge: Most of it was sent by relatives who can't see very well.
(An egg hatches and a rhino comes out)
Lisa: Rhinos don't hatch from eggs.
Homer: What did you just see, Lisa?
Lisa: I know, but . . .
Homer: What did you just see?
Homer: On the plane, I'm gonna need two seats (points to his butt cheeks) for the twins.
Flight Attendant: Please prepare for our landing in Tanzania.
(Someone hands her a note)
Flight Attendant: Excuse me. It is now called New Zanzibar.
(Someone hands her another note)
Flight Attendant: I'm sorry. It is now called Pepsi Presents New Zanzibar.
Homer: Hurry up, I can't stand here jabbing you all day!
Bag Boy: Please, ow, stop, ow! Bag boys have feeling too, you know!
Homer: No you don't!
Homer: So, I've noticed your home smells like feces. And not just monkey feces.
Homer: Olive oil? Asparagus? If your mother wasn't so fancy, we could shop at the gas station like normal people.
Bart: I need this candy for school…candy class.
Homer: Well okay, but get five bags in case we eat four on the way home.
Lisa: My teacher said I need cupcakes…cupcakes to learn.
Homer: In the cart.
Bart: I'm out of wine…
Lisa: These are just pictures of monkeys from famous movies! This is disgraceful, Doctor!
Dr. Bushwell: All right! So I snapped! You don't understand the crushing loneliness and greed!
Bart: Well, I found another one.
(Bart crosses off "warthog" on his animal watching sheet)
Lisa: Bart, you didn't see a warthog.
Bart: I'm looking at one right now.
Lisa: Mom, Bart implied that I was a warthog.
Marge: No one's a warthog.
Bart: What about him?
(Bart points to a warthog in the car)
Monkey: I found another diamond!
Other Monkey: That's a zircon, you idiot!
(Kitengi turns off the lights and leaves.)
Marge: Homer, did you remember to tip Kitengi?
(A pair of eyes appear in the dark.)
Kitengi: No, he did not!
Homer: The Simpsons are going to Africa.
(In Africa, two tribesmen dance around a fire. Suddenly, one of them stops)
Tribesman: What is it, N'gungo?
N'gungo: Evil is coming.
Tribesman: What shall we do, N'gungo?
N'gungo: (puts his mask on the other tribesman's head) You are N'gungo now!
Ms. Skinner: And you! Start over! I want everything in one bag.
Bag Boy: Yes, ma'am.
Ms. Skinner: But I don't want the bag to be heavy.
Bag Boy: I don't think that's possible...
Ms. Skinner: What are you, the "possible police"? Just do it!
Homer: Getting eaten by an alligator is just like falling asleep, in a giant blender.
Kitengi: They'll be back! They left their cargo pants.
Homer: Now we look at the map.
(Turns animal crackers box over to see a picture of Africa.)
Homer: Hee-hee, a monkey. Now, according to animal crackers, there's no river here--
(He goes to take a step forwards.)
Marge: Homer, stay in the boat!
Marge: This song has been going on for hours.
Homer: Yeah! It's like the Allman Brothers!
Lisa: Find the golden giraffe and win a trip to Africa?
Homer: Africa? They're bound to have food there!
This episode was nominated for the 2001 Emmy Award for Outstanding Music Composition for a Series (Dramatic Underscore).
Blackboard Joke: I will not flush evidence.
Couch Gag: The family enters the living room and forms a kick line. They are joined by chorus girls, jugglers and then the living room wall rises into the air as the camera pulls back revealing a show biz spectacular that also features magicians, balancing elephants and trapeze artists.
The character of Dr. Joan Bushwell appears to be based on Jane Goodall, a famous primatologist and chimpanzee researcher who has also worked in Tanzania.
Waitress: Kiss my grits!
This is a classic line spoken by the character Flo (played by Polly Holliday) from the 70's sitcom Alice.
Marge: Even on the soles of her shoes.
The greenpeace person states that Dr. Joan Bushwell has "Hidden Diamonds Everwhere," In which Marge replies with "Even on the soles of her shoes." This reference is to a song written in 1986 by Paul Simon titled "Diamonds on the Soles of her Shoes," a song about a rich girl.
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