After SGT Torvalds. L's chest cam records the arrest at the Canberra airport (a reference to Linus Torvalds as discussed in Trivia for S1E6), footage during the apartment building search for Callum is recorded by the chest cam of 'SGT Stallman, R', a reference to Richard M. Stallman (rms), founder of the Free Software Foundation and author of the GNU General Public License.