This is a good story involving quite a time span.  There is good character development in Sam and we see a side of the Doctor that we have never seen before.  This story introduces the story of Savar, a Time Lord whose eyes were stolen, that also appears in the BBC Missing Adventure Infinity Doctors.

The terminals were in the back room of the teashop, where customers could get a little privacy and quiet.  There were even completely private rooms, at an extra fee, mostly used by businesspeople needing to uplink to a satellite or phone home.

It was interesting, thought the Doctor as he followed his host to one of the small, silent rooms, that miniaturisation could go only so far; he'd seen palmtop computers here and there on Ha'olam, but most people seemed to prefer something a bit chunkier.  A bit more real.  People carried them like briefcases, lighter and smaller and millions of times more powerful versions of the twentieth-century laptop.

The Doctor flipped open the datatablet and looked in surprise at the arm that unfolded from its side.  He hadn't seen one of these before.

The jointed arm came to rest just in front of his face.  A round lens, perhaps a couple of centimetres across, unfurled from the end.

He was wrong.  He had seen something like this before.

He considered the device as he poured himself a cup of tea and added milk from a tiny white jug.  His host had left a small beeper on the tray in case he required anything else.  A brightly coloured rug hung on the wall, next to the inevitable holo-ad, this time for Fizzade.

He remembered the INC receptionist staring at her screen, her hands hovering above the digitpad.  A heads-up display, some kind of implant in her eye.

The Doctor touched the lens with just his fingertips, sipping his tea.  This, he realised, was the poor man's version of the same arrangement.

He sat forward and peered into the lens.

There was bright, blue flash of light and then a three-dimensional menu appeared before him, rotating slowly.  It took only a moment to puzzle out the navigation principle.  Setting the tea down on the table, he plunged into the network.

The speed of access was almost exhilarating, as he dashed along the electric pathways that connected the planet's computer systems.  It was not so fast as a direct connection between brain and computer - but then, not so grotesque either.  He had never been entirely comfortable with the fusion of body and machine.

The technology was well in advance of its time.

It took less than a minute to discover INC's electronic headquarters, a sprawling mass of databases and advertising.  He skimmed through them like a seabird just touching the surface of the water, tracing long lines of contact.

None of this public material would tell him what he wanted to know, of course, or the data-umphs would have made short it.  It was the private computers, hidden behind bright barriers of passwords and identity checks and similar nonsense.  Obstacles between him and Sam.

IXNet, the corporation's internal network of employees, perched on the datascape like a vast metal spider with hundreds of thousands of legs.  He decided to poke at its security just a little, see if he could get the measure of it.  There - a simple port intended for employees, like another of the three-dimensional menus.

He moved his eye, blinked, blinked again, taking hold of the port.  It asked him to wait for a moment.

There was a dizzyingly brilliant flash of light.  He eye instinctively screwing shut, but his left eye stayed wide open as a beam from the lens waved up and down, twice, scanning his retina, scanning it again to confirm.

And then the port rotated and opened, like an eye staring back at him for a moment, and let him in.