I know this is sheer fantasy, but it was fun to think about
6 toy sets of 6 figures, each with a segment of the key to time:
1. The Ribos Operation:
Fourth Doctor (Shrieve guard outfit)
Romana (white coat/Dress) (w/ tracer, scringe stone (jethrik), 1st segment piece)
Garron
Graff Vynda-K
The Seeker
Shrivenzale
2. The Pirate Planet:
Romana (pink/white outfit) (w/ macromat field integrator, 2nd segment piece)
The Captain (w/ Avatron)
Mr. Fibuli
The Nurse
Mentiad
Guard
3. The Stones of Blood (girl power set!):
Romana (red skirt) (w/ hyperspace gun, 3rd segment piece)
Cessair
Ogri (2)
The Cailleach
Professor Rumford
4. The Androids of Tara:
Romana (Taran outfit) (w/ 4th segment piece)
Count Grendel
Prince Reynart
Princess Strella
Zadek
Taran bear
5. The Power of Kroll:
Fourth Doctor (high wading boots)
Romana (Kroll outfit) (w/ 5th segment piece)
Dugeen
Rohm-Dutt
Ranquin (Swampie 1)
Mensch (Swampie 2)
6. The Armageddon Factor:
Romana (white dress) (w/ 6th segment piece, completed key)
The Marshal
Princess Astra
The Shadow
Shapp
Drax
(I'll start holding my breath now...)