The "computer code" shown is actually HTML (hypertext markup language), the code used to make Web pages.
Dov Tiefenbach (Walter Danzig) appeared in the CSI: Crime Scene Investigation (2000) episode Fannysmackin' (2006) (#7.4) in a different role.
Blake Gibbons (Darren Gorland) appeared in the CSI: Crime Scene Investigation (2000) episode Man Up (2011) (#11.11) and the CSI: Miami (2002) episodes Dead Air (2006) (#4.21) and Backfire (2010) (#8.21) in different roles.