Starting today

Ocean Warriors

Season 1 Discovery (*121) 20:00 Doccie What it’s all about: environmental activists sail the seven seas to safeguard the marine world. Episode 1 The team do battle with illegal fishermen in Thailand and stop poachers who’re using explosives along Tanzania’s coast.

Supernatural

Season 12 Vuzu AMP (*103) 21:30 Sci-fi (see sidebar) Where we left off: Dean found his supposedly dead mother wandering the woods. Episode 1 Toni tortures Sam to get info about the hunters, and Dean gets his mom up to speed.