bartholemeow catpaw I found this show to be very interesting. However, the host is quite repetitive, and I would have liked to see more EXPERT commentary. He often spouts off vague explanations and seems unsure if we are looking at a cemetery/hippodrome tunnel/ royal courtyard/ lavatory. you get the idea. I also have a penchant for dark spaces so I really feel at home watching this show. However I feel like they could have spoken more about the creatures that live down there, since they are obviously not abandoned. If you pause at 3:40 in the Instanbul video you will see traces of scat. I would have enjoyed it if the narrator had identified the scat and given more insight into what animals live down there (cats). Overall, the imagery makes the show interesting enough to keep me watching. would bump up rating to 8 with more cats.7.5/10

frompkin I love the show, and I normally don't comment but I feel the need to speak up. Eric Geller did an excellent job as the host. A major part of the reason I watched the show, was due to his enthusiasm. Yes, there was a certain amount of reiteration, but this is done for the slower members of the viewing audience. His zest and obvious interest is what he is doing, is so lacking from some shows out there. When the host is obviously bored by the topic, and isn't having fun, the viewers won't have fun. I read a rumor that the History channel has renewed for another season. I hope they bring Eric back, and allow him to continue to have fun with the show and share his joy in the topic.

antony-1 Getting a chance to see underneath some of the world's greatest cities is quite a treat. The shows find everything from mass graves to war bunkers to breweries, and the show gives an interesting insight into things that normally go unseen.However, the show is difficult to watch due to the narration and the host.The narrator keeps on labouring certain points over and over again. We know the premise of the show... underground places that aren't common knowledge. However she keeps on making this point. We see something under a train station, and she'll comment about how those in the train station don't know what's going on. Then she repeats this for every location, continually making reference to the people above being oblivious (the host also makes reference to this point a lot). Conversely she says at one point, while under Paris, that's you'd forget that 2 million people are above. Erm, why? We're under Paris and that's the entire point of the episode. Oh, I forget, we're trying to sound mysterious! When water drops from the ceiling, the host makes reference to 21st water dropping down to the 13th century.Which leads me into Eric Geller, the host, has a similar style of trying to inflate everything. We see some walls made of bones, which themselves are enough to have an impact on the viewer at home without saying much. However we have to have Geller screaming about wildly. "There's bones!" Yes we know. "So many bones!" Yes, we get it. "LOTS of bones!" Be quiet now.The show could be better if they stuck to the subject content without all the hyperbole. But it feels as if they are worried viewers will get bored, and the only way to keep them involved is by keep on repeating themselves rather loudly.

brianinnh This program has turned out to be a very interesting investigations of the 'secret' underground worlds under many of the largest and most famous cities of the globe, from New York to Budapest, London to Rome.The information is well presented and filmed and your interest is held comfortably for the length of the shows.My only complaint, and it occurs only occasionally, is that the presenter, Eric Geller, can become overly loud and overly demonstrative when pointing out certain areas or items that, in my opinion, didn't deserve the exaggeration, yet most of the time he is enthusiastic and not as overpowering.