One of the least terrible Once and Future audio stories, Past Lives still lacks a central theme or message other than a scant look at nostalgia and a "wouldn't it be fun if..."

The story's chief selling point is The Fourth Doctor meeting New UNIT, and tangling with the Monk. There are other plot threads, including a Warrior Dino Alien Invasion, and the appearance of an immediately post Hand of Fear Sarah Jane, whose presence in the story seems superfluous. Still, this is far from truly horrid, and an enjoyable way to spend an hour.