Alvares was a member of the Homeguard. Ivanova and Sinclair put on a ruse that he is secretly bitter and hateful towards aliens and fellow member of Homeguard,Malcolm Biggs, buys it completely. Biggs reveals Alvares and the other Homeguard agents on board Babylon 5 as well as a new stealth cloaking field. Sinclair and Ivanova reveal the double cross as Garibaldi and his team arrest Alvares and his fellow Homeguard members.