But, this show is gripping and engaging. The science fascinates me. I admit the first few seasons focusing on Sam Ryan were ok for the most part but I was glad of the switch to character driven storytelling when Dr. Ryan decided that her story ended when she found what happened to her family. When the storyline started to evolve into more interesting and diverse characters, then is where my interest started to catch fire. There is a mountain of backstory in each and every script, and if you want to catch it all you must pay very close attention. I love Britbox, it's pretty cool. Here's hoping for season 27. Wow. That's a lot of seasons.