Vikings becomes progressively shaky after Ragnar dies, but S5 E5 is where occasional chuckles at the previous episodes now turns into outbursts of cry laughing at just how absolutely hopelessly god awful it's become. No direction whatsoever, just random garbage that tries to set up a rule in one scene, and immediately breaks the rule 20 seconds later, over and over again. The characters do and say the most absurd things in contrast to how we've always known them before. Lagertha is now nothing more than a pathetic plot device to cause pointless tension for no real reason. Floki has turned into a psych ward patient cult leader, and Lagertha hates him for some reason now, why?
Bjorn's Arabian Nights turns into a gay romp in the desert with those male concubines. Why are Bjorn and friends there? Why did he get rid of 90% of his fleet because Sinric told him to? Where did his fleet go after that? They just vanished without a trace.
And then there's the opening scene of the Bishop LOL Cow himself, being the most insanely over the top clown of the entire show, screaming "Heathen!!" like this show has turned into Wicker Man 2 featuring Nicholas Cage or whatever.
And the ending when the Bjorn Bros are randomly about to get beheaded, lo and behold a storm rolls in to save them! Deus Ex Machina indeed!
This episode must be studied in Comedy Schools the world over, because it's so hilariously bad.