BBC America offers a well-curated selection of TV shows and movies for online streaming. Among their premium lineup is 'The Chelsea Detective,' an engrossing British crime drama series with intriguing plotlines. The story progression is carried out with accuracy, employing a myriad of murder mysteries ranging from an educator brutally killed in his study to a man plunged to his death by a supposed vengeful spirit. The show features Detective Inspector Max Arnold and Detective Sergeant Priya Shamsie as they uncover dark secrets and delve into the complexities of each case.

In addition to its staple crime series, BBC America hosts another gripping show titled 'Attenborough: Behind the Lens.' This programme gives unprecedented access to Sir David Attenborough, showcasing aspects of his life and work as they have never been seen before. It provides a unique glimpse into the life of this renowned naturalist, adding a personal touch to the vast nature documentaries he has contributed over the years.

Equally captivating is the nature series 'The Wild Sides,' set in Mashatu, a place that, despite a harsh drought, has become a thriving Eden. The series captures the transformative phases in the landscape from drought to rainfall and examines how it affects the ecosystem's wildlife, making for a fascinating watch. Parents teaching and feeding their young, perhaps indicative of the survival tactics employed in the wilderness, add another dimension to the series.

In conclusion, BBC America provides a diverse range of shows, each distinctive in its content. Whether one's preference leans towards crime dramas or nature documentaries, there is something for everyone. Every show on the platform is well-directed, with each episode artfully constructed to captivate the viewer from beginning to end.