Just a few general background observations from the first forty-eight minutes (plus commercials). Pay them very little mind.
A. 'Mole on board' sign. Literal window dressing? If all of the contestants had been picked up, the Mole would have been on board, period. That Corbin was driving it might be the first false lead or a blazing arrow fired through his hat.
B. 'Driver carries only $30,000 in change' sign. Huh. If they'd managed all seven pickups, the game would have been worth $35,000 -- no money for Corbin's driving. (Read _that_ any way you like.) So the Mole is worthless here.
Speculation: what if the Mole was the last person to be picked up, and had instructions to wander off if word came in that the taxi was getting close? 'Nobody's here. Let's get back to the beach before we run out of time.' Easy enough to claim bathroom break... (Tracey and Keisha weren't picked up. Keisha would have been last -- according to the quiz, waiting at the elementary school.)
C. 'Digging up fares all over the Yucatan' sign. Nothing comes to mind beyond Stephen's acting turn as Barney Rubble. Anyone else have dirt in their past?
D. Carlos and Pepe', Chicken Cargo. Are the names significant? Did we actually have two roosters there? (I am not a chicken sexer by trade. And yes, that term is (probably) allowed under the rules of the board.) Surely not a sign of two Moles.
E. 'Honk if you love Ahmad' and 'I brake for celebrities' signs. Not unless we're doing something with initials or anagrams. Good luck.
F. 'Where fares are executed quickly' sign. If only the fares can be executed, then the Mole is Corbin or someone who was told not to be picked up under any circumstances -- again, possibly those at the end of the chain.
G. Whatever That Thing Was Hanging From The Rear-View Mirror. Did anyone with a high-definition TV or better freeze-frame than I have get a good look?
H. The bobble-head paranoid rat in the back window. Well, Corbin's been sort of paranoid in the past...
I. Stephen's orange New York Yankees hat. Not a standard color.
J. Production note: My, Tracey and Keisha showed up quickly. Either that was one amazing edit jump-cut, or the taxi had a staff car following it: as soon as the taxi headed back for the beach, the staff car would have scrambled for the last two contestants.
Back on the beach:
K. What is that thing behind Tracey's head in her solo shots?
L. Is Dennis holding a magazine on top of the taxi?
The journal table:
M. The fish on the walls: Each one was painted to show only one eye, and as Corbin noted, there was a single gold one. (Sniffing the paint was actually halfway intelligent: see if it's fresh enough to detect newness by nose. It just _looked_ bad.)
N. What is that white object behind Stephen's head in the solo shot? A menu? A book?
O. Can anyone make out what's written on Keisha's blouse?
P. Dennis' shirt?
Q. Where was that birthday cake mentioned in the quiz, anyway?