The Avengers 5.3: The Bird Who Knew Too Much A step up from the first two below-par episodes, there nevertheless remains a pervading sense that Season Five isn't yet firing on all cylinders. The plotting isn't quite smart enough, even at its most playful, and the eccentricity is all a bit learnt. But The Bird Who Knew Too Much does at least move along at a pace, and features a couple of – well, one in particular – truly nasty psychopathic hitmen, which makes for a jarring but effective contrast when one of the characters is a bird enthusiast named Twitter.