Watched 'The Android Invasion' from the Tom Baker era.

I agree with Bingowings above point, that the finger guns were a big mistake as they far too similar to The Autons. However aside from that, I thought The Androids were a significantly different proposition to their plastic cousins with a whole different agenda.

The basic plot is 'Invasion of The Bodysnatchers' run by an alien Dr Mengele who looks like a mutated Rhino. The serial was full of interesting concepts and ideas related to the premise of aliens trying to copy people and places. Sometimes with less than accurate results like failing to realise that calenders have more than one day or that all coins aren't the same... and I was left with a craving for a couple of pints of Ginger-Pop.

Milton Johns once again turns in a great performance in the show, totally different from both of his other evil or devious roles (The brainwashing reveal was a brilliant idea). The subtle and chilling performance from Elizabeth Sladen as her doppelganger is a world away from her melodramatic acting from the Sarah Jane Adventures that was sadly her last trip into the Whoniverse.

!!!!!!!!!!!!!SPOILER FOLLOWS!!!!!!!!!!!

It was a bit strange that, although The Doctor defeats the evil alien scientist Styggron at the end. The writers seemed to have forgotten that there was still a Kraal Invasion Fleet lead by Marshal Chedaki waiting to invade Earth (Styggron was just trying to capture Earth through science first, rather than outright force). So presumably the Kraal forces are still waiting somewhere in space to invade Earth, forty years later.

But putting that aside it's Barry Lett's excellent and inventive Direction that lingers in the memory.