
A hairpin bend, an oncoming car with nowhere to go, and a dying clutch that won’t accelerate out of trouble — the bike goes down, Susan’s airbag vest fires, and Clif ends up rolling downhill like Humpty Dumpty.

A wrong turn at a Y-junction sends the heavily loaded bike onto a crumbling 45-degree mountain track with no way to stop — too steep to brake, too far to turn back.

Lunch with an unexpected backdrop: a genuine C-123 cargo plane tied to the 1986 Iran-Contra affair — CIA arms smuggling, Oliver North, and a Tom Cruise movie, all sitting quietly beside a Costa Rican beach.

A chaotic dawn dash across the Panama-Costa Rica border — a fake ‘official’ who pockets a $2 tip, a forgotten fumigation, and a near miss with Susan almost walking through customs in her bra.

36C heat and no shoulder to stop on — Susan’s vision narrows to white light on the back of the bike before Clif can finally pull over for water and cheap ice cream.

After four fraught days chasing customs agents when the bike got stuck in Istanbul, they finally reach Panama — birthplace, as it turns out, of the land bridge that helped make human evolution possible.

Susan has said ‘never ever again’ after Buenos Aires, St John’s, Sydney, and San Diego — and here she is anyway, back on the bike in Panama, signed up for 11,500 miles all the way to Anchorage.

Act V begins: Panama to Alaska, 11,500 miles, one BOom Boom vest, and a ‘never ever’ Susan who’s back on the bike anyway.