The teleport system attached to Scorpio and Xenon Base is used for the first time in this episode, which also sees the first use of the Scorpio teleport bracelets (although Avon only uses one as a communicator and none of the crew are actually wearing them when they teleport aboard).
Orac reprogramming who Slave accepts commands from echoes him reprogramming Zen as mentioned in Redemption (1979) and Powerplay (1980).