Rutherford Training Beta 2.5 was a holoprogram developed by Ensign Sam Rutherford on the USS Cerritos' holodeck.
Rutherford used the program to teach fellow ensign D'Vana Tendi how to space walk.
Badgey was a character that Rutherford created to play a role as a tutor in this program, but his programming became corrupted during an incident in which the Cerritos encountered a Drookmani ship, causing him to become a murderous psychopath. (LD: "Terminal Provocations")
Rutherford later used the program again, this time to create a computer virus with which to infect a Pakled starship. (LD: "No Small Parts")