His last concrete memories (and I am unsure as to whether or not he intends me to take that idiom literally) are from our last visit to
Lothar has some dim memories of Admiral Janeway which he also refuses to talk about, except that I infer that she failed to succeed with him what she performed upon me. In any event, it seems that she found out about Project GWIII and tried to bring Lothar under her control. Janeway had made another mistake – she repaired and upgraded Lothar's systems before she attempted to condition him, and he escaped. He was met by Lothar #2, a.k.a. Carpe Jugulum, who brought him to me before vanishing.
The rest, as they say, is history. We escaped from the Starfleet Command and the Solar System together, and are currently keeping ourselves busy while we plan our next move. Lothar is not certain of everything that was done to him, but he certainly seems to be more rational and in control (relatively speaking, for Lothar) than he was before.