Otto worked in the garden near Joe Dakin's flat in 1987. He was a hippie in his twenties. He saw the battle between the Virgoan probe and the Krynoid, but wasn't fazed by it.
Eighty years later, Otto worked in the same place, but by now it was a mansion where the Master was housing elderly people that he had conned into believing he could de-age them. At this time, Otto was, as Ace described him, an "ageing hippie". (PROSE: Stop the Pigeon)