Lords of the Storm
The Sands of Time
Goth Opera
Peter is always complaining about the cheapness of the production (on all the DVD commentaries) but there was some rather good writing from his era.
The Caves of Androzani
Earthshock
The Five Doctors
Resurrection of the Daleks
Kinda
Castrovalva
Four to Doomsday
Kinda
The Visitation
Black Orchid
Earthshock
Time-Flight
Arc of Infinity
Snakedance
Mawdryn Undead
Terminus
Enlightenment
The Kings Demons
The Five Doctors
Warriors of the Deep
The Awakening
Frontios
Resurrection of the Daleks
Planet of Fire
The Caves of Androzani