“Imagination can run wild”: What lured Gretel Killeen to The TraitorsHaving turned down plenty of hosting offers, the playfulness and fun drew Gretel Killeen back to hosting on 10. Let’s all pretend we’re in this situation and let’s see how we cope with that situation,’ and I think that’s a terrific thing. Episode one sees Killeen as a ghostly resident of Claremont House in New Zealand, revealed to the Reality TV participants via a coffin. I think that’s really nice. Not all reality, but the reality shows I’ve been involved in, I really like seeing how humans behave,” says Killeen.