Are the Prussians using a secret code based upon the novel "The Three Musketeers"? Rebecca and Phileas investigate only to encounter Cavois, a dangerous assassin.  When Cavois succeeds in killing their code expert in an ingenious way, the cousins take another approach.

Jules decides to go straight to the source, his friend, Alexander Dumas, author of the book in question. Dumas is living in squalor, having spent his fortune building the Phoenix, a machine based upon designs by Cardinal Richelieu. Dumas does not know how the machine works or what it does.

Unfortunately for our heroes, he finds out soon enough when Passepartout accidentally sends his master, Rebecca, and young Verne back in time to 17th century France, where Cardinal Richelieu's vile plans are opposed by D'Artagnan and the Musketeers.

Guest Stars: John Rhys-Davies and Rene Auberjonois

Viewer Tip: Take a close look at Cardinal Richelieu. Look familiar?

Cavois takes aim

The mysterious Phoenix

Rebecca takes a bullet

"You don't know what it does?"

Dumas takes Jules' money

Passepartout finds out

 The Cardinal's design?

Trapped in the past

Rebecca finds a problem