Frankel also directed many documentaries and feature films, including Never Take Sweets from a Stranger (1960) and School for Scoundrels (1960; taking over from Robert Hamer, who was credited as sole director).
She appeared in several major fantasy and horror films when she was very young, such as Hammer Films' Dracula (1958), Never Take Sweets from a Stranger (1960) and The Two Faces of Dr. Jekyll (1960) as well as The Day of the Triffids (1962).
Despite its nominal Canadian setting, exterior filming for Never Take Sweets from a Stranger took place at Black Park in Wexham, Buckinghamshire.
Stranger in a Strange Land | Stranger Than Paradise | Welcome Stranger | Stranger in Moscow | Never Take Sweets from a Stranger | I See a Dark Stranger | Hello Stranger (film) | Hello Stranger | Dance with a Stranger | Tread Softly Stranger | The Perfect Stranger | Sword of the Stranger | Swisher Sweets | Sweets and Sour Marge | Spit on a Stranger | Rolf Stranger | Naked Came the Stranger | Goodbye Stranger | When a Stranger Calls Back | Toot Sweets | The Sweets of Sin | The Stranger Wore a Gun | The Stranger in the Mirror: Dissociation – The Hidden Epidemic | The Return of Clint the Stranger | The Restless Stranger | The Perfect Stranger (film) | Talking to a Stranger | Sweets for My Sweet | Sweets and Other Stories | Stranger Pond |