The first episode of the Infinite Quest, a bit like a prologue, introduces us to the characters very quickly.

While Martha's animation seems to be on the money, the Doctor's animated character does not convey David Tennant's features very well at all.

The TARDIS lands on a hand burnished bird shaped ship captained by Baltazar, scourge of the galaxy - voiced by Anthony Stewart Head.

While a three and a half minute cartoon is probably only interesting to fans under 12, this prologue gives us a taste of what to expect from Freema's character in the future.

The witty and intelligent banter about converting all the carbon lifeforms in a plasma cloud on Earth into diamonds, and Martha's extremely quick understanding of some of the more elusive comments suggests that we'll be returning to the rocky ratings days of the Romana era.

While the viewers need a strong, intelligent character to help the Doctor think outside the box, they also need someone similar to themselves. So Martha can't be too smart or else several characters like Rose will have to make an appearance to keep the audience connected.

Baltazar, from the age of the Space Pirates methinks, snips the Doctor's gold spoon in half, knocking it to the floor and causing the metal eating mould impregnated in it to become active. Baltazar escapes with the traditional "I'll get you Doctor" as the Doctor and Martha disappear in the TARDIS. We get to see his fabulous ship completely destroyed.