Part 2...sorry for the double post...10000 max characters exceeded...
Making their way out of the cemetary, Indy and Mutt come face to face with some Russian soldiers. Mutt is able to escape and get to his motorcycle...and comes back to get Indy. Indy jumps on the back, and a chase pursues through the countryside of Peru...heading for the city. Insert various stunts and chases through the market streets of Peru...ending in Indy and Mutt being captured by the Russians and taken to a campsite in the jungle.
Indy is being held in one of the tents in the campsite...when Mac is brought to him by some of the guards. Indy is excited to see he's still alive, but Mac is angry at him for leaving him back at the warehouse. Indy mentions to Mac about translating the alien text that tells of a hidden city in the jungle...but to keep quiet about it (not wanting the Russians to find out). Mac is led out of the tent, and a little later Spako enters and asks about the lost city. It seems Mac is now playing for the other side (Indy promises him that he'll break his nose), and that if Indy doesn't help find the city, she is going to kill Mutt's mother...who Indy then finds out is Marion.
Indy, Marion, and Mutt are tied in the back of a vehicle, allowing Indy and Marion to reminisce (fight and bicker) about old times. Mutt eventually uses his knife to get free...and unties Indy and Marion. Indy takes over the vehicle (which we actually see him doing...not like in KOTCS) and begins to head for Spako's (with Mac) vehicle to get back the skull. Out of nowhere, the jungle cutter (driven by Dovchenko) rams into the side of Indy's vehicle...destroying the back of the truck into pieces. Dovchenko is just about to use one of the blades of the jungle cutter to chop Indy and crew, but Indy whips the arm of the blade, deflecting it and causing it to fly off into one of the Russian soldiers vehicles (screams can be heard). Indy climbs up the jungle cutter and begins fighting Dovchenko on the moving vehicle. Dovchenko eventually gets killed by the blade of the jungle cutter, and Marion and Mutt pick up Indy in the vehicle that was sliced open by the flying blade before. Chasing after Spalko, Marion pulls up to Spako's vehicle and Mutt jumps onto the back. Mutt distracts Spako (swordfight) as Indy punches Mac (in the nose as promised) and steals the skull. Indy and Mutt make their way back to Marion's vehicle before the vehicle enters the river...leaving Spalko and Mac on the shore behind.
Indy and co. slowing make their way through the steamy and winding river...the steam so thick, it's hard to see far ahead. The amphibious vehicle passes below some low hanging branches of a tree, and Indy comes face to face with a huge tree snake. Indy freaks out and screams. Mutt finds it humorous and begins talking about how Marion would talk about his dad screaming like a girl around snakes (not putting two and two together that Indy is his father). Marion and Indy continue to bicker about the past, as Mutt realizes they are about to go over a waterfall. Indy and Marion continue to ignore Mutt, yelling back and forth...as Mutt finally gets their attention right before going over the falls.
The three are tossed from the vehicle into the water below...after coming to the surface, Mutt feels a fish brush his leg below the water. Mutt freaks out (he has a fear of sharks and thinks its a shark)...Indy convinces him that it's ridiculous to think that sharks would live in a river in Peru...when he notices that the fish are actually man eating Pirranahs. The group begins swimming for their lives to the shore...making it out with just a few bites and scrapes.
Indy continues to use the map to find the lost city, and they finally find it hidden deep in the jungle. The entrance to the city is actually a tunnel that goes deep into the ground...hidden by foilage. Indy, Marion, and Mutt enter the tunnel towards the lost city. On the tunnel walls are paintings and carvings showing alien beings teaching a tribe about farming, irrigations, etc. as in KOTCS.
The hidden city is actually underground (hence the HIDDEN part of the city and why it was never found before). Indy, Marion, & Mutt make it to the alter room where the skull must be placed on the body. Indy begins telling that the one who places the skull will gain knowledge of the universe...of everything. Just as Indy is about to place the skull, Spalko enters the chamber with Mac and points a gun at Marion. Indy hands over the skull to Spalko, and she places the skull on the body. Immediately the room begins to regain it's look...going from an old ruined temple to a golden room filled with ancient (and alien) technology. The skull begins transmitting knowledge into Spalko's eyes...Mac focuses his attention on all the golden items around the chamber as Marion and Mutt leave the room. Indy is trying to convince Mac to leave with them, but Mac refuses to until he has all that he wants. The ceiling of the chamber begins to fall away, and the chamber itself begins to shake and rumble (as if starting up a vehicle). Spalko is frozen in the middle of the room, with "strands" of knowledge still entering her eyes through the eyes of the skull...the strands come to an end, Spalko now has endless knowledge and begins yelling to Indy that she can see everything. Then shock goes over her, as she sees how she will die...and that it happens in the very room that she is standing...and she keeps having visions of her head exploding because of the amount of knowledge. Now she's frozen in fear...knowing that she is going to die soon.
Indy reaches for Mac to pull him out of the chamber as the chamber begins to lift out of the ground. Indy begins to get sucked to the ceiling of the room, but because of his gold filled pockets, Mac is still on the ground. Mac finally has a change of heart and reaches for Indy's whip...grabbing it just before Indy takes off towards the ceiling. Now Indy is hanging in the air, with Mac being held down by the weight of the gold. Indy begins "climbing" down the whip towards the exit of the chamber and makes it out just as the chamber lifts off the ground and heads into the sky, Mac still inside.
With the ancient spaceship lifting into the sky, Spalko finally awakes from her frozen state, to see the crystal skeleton staring back at her. A slight movement from the skeleton happens (just enough to show the skeleton as being alien) as Spalko's head explodes.
Indy, Mutt, and Marion watch as the spaceship disappears into the air and water enters the basin where the spaceship layed dormant for years..."like a broom to the footprints."
Transition to Indy being awarded at the university and being named Associate Dean of the college. Mutt (holding Indy's fedora) and Marion come up to Indy and talk about Indy settling down and becoming a family man. Indy replies about not planning that far ahead, but you never know. Marion and Indy begin to walk away...zoom into Mutt looking at Indy's fedora and just about to put it on...as Indy's hand comes into screen and takes it away. Final shot as Indy and Marion walk across the campus grounds...with Mutt behind them.