User blog comment:Zwhit3/Groves and Gillete/@comment-3331718-20120116160045

Actually, Groves is the one who got promoted (from lieutenant to lieutenant commander). Gillette stayed at the same rank of lieutenant but it should be noted that Gillette wears more finely decorated officer clothing in the fourth movie than what he wore in the first. This could indicate some level of promotion (since what you wore during that time showed what level of the social status you were in) but it is highly unlikely. In addition, Groves only appeared in the 1, 3 and 4 ones. Gillette only appeared in the 1 and 4 ones. I'm really hoping that we see these two again. Rob Marshall confirmed their deaths but there's always a chance of a plot twist! (Why would the crew of the Providence carry away dead bodies? There has to be a reasonable explanation for that.)