Think You've Seen It All... Think Again! (TV story)

 was a narrative trailer advertising the second series of Doctor Who.

On 5 April 2006, a 15 second teaser advertising the Tardisodes, using elements of this trailer began airing.

Cast
DWMSE 14 revealed the following credits:
 * The Doctor - David Tennant
 * Rose Tyler - Billie Piper
 * Voice-over - Josephine Butler

Crew
No crew were credited for this trailer.

Uncredited crew
DWMSE 14 revealed the following credits:
 * Director - Sarah O'Gorman
 * Producer - Jane Booth
 * Creative - Lisa Gledhill
 * Production manager - Gail Pardon
 * Post-production - Simon Holden
 * 1st assistant director - Jo Carter
 * 2nd assistant director - Lynsey Muir
 * Runners - Tim Hodges, Nick Britz
 * Director of photography - Richard Mott
 * Steadicam operator - Dion Casey
 * Focus puller - Rupert Prince
 * Grip - Pete Nash
 * Electrician - Steve Slocumb
 * Gaffer - Mark Hutchin
 * Sound recordist - Crispin Larratt
 * Art director - Lee Gammon
 * Costume designers - Angela Jones, Andrew Mear
 * Make-up artists - Steve Smith, Moira Thompson

Other series 2 trailers
There were also other non-narrative clip based trailers advertising the second series.

Christmas special
On 2 December 2005, the first 10 second teaser for The Christmas Invasion aired on BBC One; a second 10 second teaser later aired on c. 9 December. They were also released online on the Doctor Who website, and teased the Christmas tree and Santa brass band respectively.

A 30 second trailer began airing from 11 December, and a second 30 second trailer from 19 December. All the teasers and trailers featured the tagline Something's coming...

Immediately after the Christmas special, a 15 second trailer advertising Attack of the Graske, aired on BBC One; however it was referred to as Doctor Who Interactive. During the trailer a link to BBCi, labelled Fly the TARDIS, appeared in the top right-hand corner.

Main series
A 2'50 '' trailer began airing on the BBCi service from 14 April 2006, it had been created for the press launch on 28 March 2006, and the music used was "Colossus" by Hollywood Trailer Music Orchestra and the "Doctor Who theme" arrangement by Murray Gold. It featured clips from Tooth and Claw, School Reunion, The Girl in the Fireplace, Rise of the Cybermen, The Age of Steel, The Idiot's Lantern, The Satan Pit, and Army of Ghosts.

Six teasers, each lasting between 12-19 seconds were released, one per day, between Sunday 2 July-Friday 7 July 2006 counting down to the broadcast of Doomsday.

Home video releases

 * As of January 2021 none of the teasers and trailers are available commercially. That said, the trailer is still viewable on the BBC website at https://www.bbc.co.uk/programmes/p00j4vlf