|Start date:||October 23rd, 1977|
|End date:||March 5th, 1978|
|# of strips:||20 (20 weeks)|
|Preceded by:||"The Three Brothers"|
|Followed by:||"Narq's Conquest"|
Mandrake and Lothar arrives at Harrison University, going to do their final college benefit show this season. Among the audience sits the eccentric millionaire Mr Ttazz. He begin to devise a plan, how can he force Mandrake and Lothar to steal the famous Mona Lisa painting.
- Mr Ttazz, an eccentric millionaire.
- The mountains
- A small town.
- Harrison University
- A small town.
Behind the scenes
- The story title is taken from the strip of October 23, 1977 (Beginning: Mr. Ttazz).
- Reading through the previous stories, starting with The Roadhouse it seems like Mandrake's college benefit show tour was in California. Perhaps driving highway 49 up to Reno in Nevada, then returning through Yosemite's National Park.
- At Harrison University, Kit Walker mentioned and seen as a picture.
- In the town, Kit Walker Stadium.
This story has been published in the following publications:
- "Ladrones de Cuadros", Super Sandokan #2 (1983)
- "Monsieur TT", Mandrake #444 (1979)
- "Le milliardaire", Le Journal de Mickey #1402-#1409 (1979)
- "Le milliardaire", Mandrake (Les récits du Journal de Mickey) Volume 1 (2015)
- "Le milliardaire", Mandrake, intégrale du journal Mickey (Volume 1) (2016 or 2017)
- "The Blackmailer", Indrajal Comics #330 (1979)
- "Mister Ttazz", Mandrake #89 (1979)
- "Il ladro di capolavori", Mandrake - New Comics Now #376 and #399 (1997)
- "O Roubo da Gioconda", Aventureiro #2 (1979)