The Fourth Doctor:
Having appeared in the previous episodes with a beard it was very noticeable that David Tennant does not have a beard here.
As the earliest surviving Doctor, Tom Baker himself manages to make an appearance here about his own Doctor.
As noted by narrator Gareth Pierce, the Fourth Doctor was not afraid to use humour as his weapon and Tom Baker certainly did that very well.
One thing that I have always noticed about the Fourth Doctor era is that there were few UNIT stories in his early years. This reflects Steven Moffat describing the Fourth Doctor as an eternal child and David Tennant describing him having a free willing nature. Certainly this meant the Fourth Doctor was never going to be tie down to anything including UNIT.
This was emphasise well by showing a clip from Pyramids of Mars in which he expressed his frustration in working for the Brigadier with Sarah suggesting that if he is tired of being UNIT scientific adviser then he should resign.
Quite well in the segment on Sarah showing what a double act the she and the Fourth Doctor were.
Leela and K9 were also discussed. Not surprised that Louise Jameson (Leela) turned up here as she was the only long term companion of the Fourth Doctor that I expected to appear her since Lis Sladen (Sarah) and Mary Tamm (Romana I) have passed away and I won’t go into reasons why I think that Lalla Ward (Romana II) wasn’t here.
In fact this episode was rather conspicuous in not talking about either of the two Romanas at all.
Famous Foes that were talked about were the Zygons and Dalek creator Davros. It is fitting that Nick Briggs is interviewed in this episode as he has made Dalek and Davros stories for Big Finish including voicing the Daleks which he also performs for the “new” series.
Very effective in presenting the scene of the Fourth Doctor’s hesitation in destroying the Daleks at their birth in Genesis of the Daleks as that was truly a powerful moment from the era of the Fourth Doctor.