Ahmad avoids badass action-girl tropes by drawing out the character’s sadness and fallibility. Who is Erin Carter? A haunted woman whose dreams and regrets make her a bracing outlier within a genre dominated by interchangeable superheroes and superspies.

Mr. Henshall provides quite the novel mix of the decent and the ruthless, the rational and the menacing. He is used economically, but as a potent, overly rational counteragent to Ms. Ahmad's comparatively impulsive and guilt-ridden Erin, the result being a very convincing chemistry. And a series that maintains momentum throughout.

Despite some plot contrivances in the first episode, we’re still recommending Who Is Erin Carter? because Evin Ahmad does a good job making Erin a bit more credible.

Although the acting is fine and I will always appreciate a cinematic shot of Barcelona, where the show was filmed, there is nothing especially unique or compelling about this show.

Who Is Erin Carter? is not convincing (at least outside the scenes that Watson – a preternaturally gifted actor doing a great deal with woefully little – is allowed to dominate). Nor is it suspenseful.