Watch River Monsters (4/5) live on the web
Jeremy Wade `monster' cases usually involve freshwater culprits, after hearing multiple reports of a deep-water serial killer in Mexico's Sea of Cortez, he decides to step out of his comfort zone and into unchartered depths.
The extreme angler meets an attack survivor whose chilling account identifies the underwater assassin as `el diablo rojo' - the red devil, prompting Jeremy to brave sea-sickening conditions to track down a horrific beast, apparently even more fearsome than sharks.
Cast team for River Monsters (4/5).
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Broadcasts and Catch Up TV for River Monsters (4/5).
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Previous broadcasts on TV
Broadcasts in 2018
13/03/2018 at 20:00
Broadcasts in 2017
24/06/2017 at 20:00
19/06/2017 at 20:00
16/06/2017 at 20:00