The actress swapped her role as lawyer for an S&M loving dominatrix who dated lead character Don (played by Dan Clark) in the 2010 series.
In the episode entitled Don's Posh Weekend, she treated him to a naughty weekend as she pushed his boundaries in the bedroom.
Don found himself at the mercy of Felicity who went as far as using a candle as a sex toy as they got it on as well as introducing him to water sports.
Taking place in her childhood bedroom, she whips out all sorts of surprises as they enjoy a very kinky sex session.
TNI
The actress stripped down to a black corset and suspenders for the BBC comedy
TNI
Phoebe played dominatrix Felicity in the series
Phoebe's best assets looked as though they were about to fall out of her plunging black corset as she threatened Don with a leather whip in the BBC series.
Her character Felicity also gagged Don as she paraded around in her lingerie which she accessorised with a string of pearls.
The role is worlds away from her prim and proper character Abby Thompson in ITV's Broadchurch, which saw her defend murderer Joe Miller (Matthew Gravelle).
While the series is set to return, Phoebe has not yet officially been announced as part of the cast.
ITV
Phoebe played lawyer Abby Thompson in ITV's broadchurch
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The actress also stars in Amazon Primes series Fleabag
However, she has been busy in the US with her comedy series Fleabag, which has been picked up by Amazon Prime.
She plays a young woman trying to cope with life in London while coming to terms with a recent tragedy.
And, she is set to become even busier if reports that she is in talks to take on a "key role" in the upcoming Star War film are correct.
Broadchurch returns to ITV later this year.
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