Survivors (1975)

S2E10 Parasites

Mina strikes up a friendship with a man named John Millen and plans to meet him later at Whitecross. However, when John doesn’t show up and two other men arrive on his barge—one wearing John's hat—Mina starts to worry. Charles and Greg greet the newcomers, Kane and Grice, but they have their doubts about what the men really want. Pet shares their concerns, as she recognizes Kane from a previous encounter before 'the death'…