Colin Baker (1984-86)

Season Twenty-One (1984)

The Twin Dilemma

Season Twenty-Two (1985)

Attack of the Cybermen
Vengeance On Varos
The Mark of the Rani
The Two Doctors
Timelash
Revelation of the Daleks

Season Twenty-Three (1986)

The Trial of a Timelord 1-4 (aka The Mysterious Planet)
The Trial of a Timelord 5-8 (aka Mindwarp)
The Trial of a Timelord 9-12 (aka Terror of the Vervoids)
The Trial of a Timelord 13-14 (aka The Ultimate Foe)