You can watch the TV series "The Rookie" through several options:

• Streaming on Now TV, which offers the series with a 7-day free trial and then a subscription starting at £6.99/month

• Streaming on Disney+ with plans starting at $10.99/month

• Streaming on Sky Witness, Sky Max, Sky Go, and NOW in the UK

• Buying or renting episodes or seasons on Apple TV, Amazon Video, Sky Store, Microsoft Store, and Google Play Movies

Additionally, full episodes are available on ABC.com and Hulu in the US

. These options provide access to multiple seasons of "The Rookie," allowing you to watch it online depending on your region and preferred platform.