This specific episode became the highest-rated natural history program in the UK since 2001, attracting nearly 10 million viewers.

The freshwater influx from melting rivers provides essential nutrients for vast shoals of cod and allows narwhals to navigate new cracks in the ice.

The 2011 BBC series , narrated by Sir David Attenborough , dedicated its second episode to "Spring" . First broadcast on November 2, 2011, this episode captures the "greatest seasonal transformation on our planet" as the sun returns after a five-month absence. Episode Overview Duration: Approximately 58–60 minutes.