You can watch "Whose Line Is It Anyway?" on several streaming platforms and TV channels:

• The CW network streams current episodes hosted by Aisha Tyler, featuring Ryan Stiles, Wayne Brady, and Colin Mochrie, along with celebrity guests

• Roku offers streaming of the show through The CW, Runtime, Xumo Play, or Philo on Roku devices

• Amazon Prime Video (including the version with ads) streams the show, allowing purchase or download as well

• Tubi TV streams the British version of the show for free with ads

• The Roku Channel and Pluto TV also offer free ad-supported streaming of the show

• For older episodes hosted by Drew Carey, HBO Max currently holds streaming rights, though availability may vary

In summary, the most accessible platforms for watching "Whose Line Is It Anyway?" are The CW (for current episodes), Amazon Prime Video, Roku channels, and HBO Max for the Drew Carey era episodes