The show was initially hosted by comedian Aisha Tyler, but when Tyler left after completing the first season, the remaining two seasons were hosted in narration by announcer Tom Gottlieb.
5th United States Congress | William Howe, 5th Viscount Howe | South Carolina's 5th congressional district | 5th arrondissement of Marseille | Ferris wheel | 5th | Four Wheel Drive | The Wheel of Time | 5th parallel south | Michigan's 5th congressional district | George Herbert, 5th Earl of Carnarvon | Charles Calvert, 5th Baron Baltimore | Archibald Primrose, 5th Earl of Rosebery | 5th arrondissement of Paris | Thomas Douglas, 5th Earl of Selkirk | The 5th Dimension | Four-wheel drive | four-wheel drive | Catherine Wheel | Roger Bigod, 5th Earl of Norfolk | Oregon's 5th congressional district | Ferdinando Stanley, 5th Earl of Derby | 5th Cavalry Regiment | Walter Montagu Douglas Scott, 5th Duke of Buccleuch | James Mann, 5th Earl Cornwallis | Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg | Falkirk Wheel | Arizona's 5th congressional district | Wheel Squad | Thomas de Morley, 5th Baron Morley |