We're at the mid point of the series, and we're just now getting round to putting some spotlight on Tosh. This is a good thing, Tosh was in need of being more fleshed out. However, I will quibble about the story they give her here. Toshiko's whole deal in this episode is basically that she feels overlooked by her coworkers and isolated at work. This isn't a bad story exactly. It's just that it's basically the same basic story that Ianto got in his spotlight episode. Also she's into Owen, because this show seems to think that Owen is the most amazing man in all of Cardiff. Seemingly every woman on the show must want to have sex with Owen.

Anyway this leads to her being befriended and manipulated by Mary, a woman who gives Tosh a pendant that can read people's thoughts. This allows Tosh to hear about Owen/Gwen's affair and the sadness inside Ianto. She can't read Jack's thoughts though, apparently it feels like trying to read the mind of a dead man. Mary and Tosh's relationship becomes sexual. Mary turns out to be an alien. She convinces Tosh to sneak her into Torchwood to retrieve an artifact. Jack is already waiting with the artifact when they arrive. The artifact turns out to be a 2 person transporter designed for a prisoner and a guard. Turns out Mary (not her real name) is an alien criminal, who came to earth 200 years ago, killed her guard, took over the body of a prostitute called Mary and has been sustaining herself all this time by consuming human hearts. Jack gives her the transporter, but he's reprogrammed it to send Mary into the heart of the sun, killing Mary and destroying the device. Tosh talks to Jack and destroys the pendant.

It's all just fine. It's nice to get more of Tosh, and we get to see her seem both happier and sadder than usual in this episode. But the plot isn't very engaging and the episode loses points because Tosh's story (she feels underappreciated at work, leading to her doing something stupid that puts Torchwood at risk) feels like a repeat of Ianto's story from 'Cyberwoman'. I thought 'Cyberwoman' did it better.