>> anthony: blocked by officials? this could be months. okay. let the probing begin. [ speaking foreign language ] >> dan: we need this boat to move here now. how do we do this? >> anthony: let's get underway before they figure a new tax to levy on us. >> people: bye. bye, bye. ♪ >> anthony: our trip downriver will take us some 120 kilometers even deeper into the jungle. but instead of kurtz and his ivory horde, a crumbling belgian research center with a shadowy past awaits us at our destination. this is a turn of the century map, so kisangani was then called stanleyville. leopoldville, that would be here.