Package: xscreensaver-data

"xscreensaver-data" package binaries on Debian:

/usr/bin/xscreensaver-getimage /usr/bin/xscreensaver-getimage-file /usr/bin/xscreensaver-getimage-video /usr/bin/xscreensaver-text

You may install this package on Debian with apt-get install xscreensaver-data