S01:E09
Link to the WHY tiara: https://wiki.why2025.org/GraphicDesignIsMyPassion
Hal2001 talks: https://media.ccc.de/search/?q=hal2001
Where to hack: https://www.owaspbenelux.eu/
Also mentioned: www.hackerhotel.nl https://nl.wikipedia.org/wiki/Galactic_Hacker_Party