| 31 December 2004 | Estonia | ||
| 20 January 2005 | Argentina | ||
| 25 November 2004 | Australia | ||
| 25 November 2004 | Austria | ||
| 12 January 2005 | Bahrain | ||
| 30 December 2004 | Belarus | ||
| 5 January 2005 | Belgium | ||
| 31 December 2004 | Brazil | ||
| 7 January 2005 | Bulgaria | ||
| 27 January 2005 | Chile | ||
| 20 January 2005 | Croatia | ||
| 3 February 2005 | Czechia | ||
| 11 February 2005 | Denmark | ||
| 1 December 2004 | Egypt | ||
| 31 December 2004 | Finland | ||
| 22 December 2004 | France | ||
| 25 November 2004 | Germany | ||
| 26 December 2004 | Great Britain | ||
| 14 January 2005 | Greece | ||
| 6 January 2005 | Hong Kong | ||
| 6 January 2005 | Hungary | ||
| 1 January 2005 | Iceland | ||
| 21 January 2005 | India | ||
| 8 December 2004 | Indonesia | ||
| 26 December 2004 | Ireland | ||
| 23 December 2004 | Israel | ||
| 7 December 2004 | Italy | ||
| 19 March 2005 | Japan | ||
| 7 January 2005 | Kazakhstan | ||
| 19 January 2005 | Kuwait | ||
| 31 December 2004 | Latvia | ||
| 31 December 2004 | Lithuania | ||
| 20 January 2005 | Malaysia | ||
| 30 December 2004 | Mexico | ||
| 13 January 2005 | Netherlands | ||
| 26 December 2004 | Norway | ||
| 1 January 2005 | Panama | ||
| 19 November 2004 | Philippines | ||
| 28 January 2005 | Poland | ||
| 9 December 2004 | Portugal | ||
| 30 December 2004 | Russia | 12+ | |
| 9 December 2004 | Singapore | ||
| 27 January 2005 | Slovakia | ||
| 31 December 2004 | South Korea | ||
| 3 December 2004 | Spain | ||
| 29 December 2004 | Sweden | ||
| 24 November 2004 | Switzerland | ||
| 30 December 2004 | Thailand | ||
| 24 December 2004 | Turkey | ||
| 12 January 2005 | UAE | ||
| 19 November 2004 | USA | ||
| 30 December 2004 | Ukraine |
Ben, Abigail and Riley follow a clue hidden in the engraving of Independence Hall on the US$100 note, noting the time shown on the tower’s clock face and tracing the tower’s shadow to a point on a wall. In fact, the original tower of Independence Hall standing in 1776 had no clock at all — it was constructed solely to house a bell (the Liberty Bell). Furthermore, that tower became unstable and was taken down in 1781, replaced by a simple pitched roof. The first clock on the building was installed in the side facing Congress Hall; the present tower with its clock was not erected until 1828. Benjamin Franklin, who features prominently in many of the clues, died in 1790, so he could not have used a tower clock to set them up. This information is taken from "Historic Landmarks of Philadelphia" by Roger W. Moss.
