Seasons & episodes

S10 · E25The Green Death (5) 1973-06-16 · 25 min＋

The Doctor manages to escape from BOSS with help from Yates and discovers Cliff has been infected by a giant maggot.

S10 · E26The Green Death (6) 1973-06-23 · 25 min＋

The Doctor attempts to destroy the giant maggots and cure Cliff but the real threat is BOSS, who is poised to take over all the world's computers.