Title sequence
The title sequence is an important part to play in any programme, as well as Doctor Who.
1963-73
The early title sequences feature an electronic "howlround" on a plain black background.
1973-80
The late Third Doctor and almost all of the Fourth Doctor featured a "slit scan" made to look like a time vortex.
1981-86
From the Fourth Doctor's last series to the Sixth Doctor's last series features a "starfield".
1986-89
The Seventh Doctor's title sequence was computer generated.
1996
The Eighth Doctor's was similar to the Fourth's, using the "Tunnel Effect".
2005-2009
This was very similar to the Eighth's, with a red vortex and a blue vortex.
2010-?
This one was similar to the previous, but grey with lightning effects, culminating with a red one with no lightning.