Isobel is a feminine given name. People named Isobel include:

"Isobel" is the 21st episode of the first season of The CW television series, The Vampire Diaries and the 21st episode of the series overall. It originally aired on May 6, 2010. The episode was written by Caroline Dries and Brian Young and directed by J. Miller Tobin.

Plot

Isobel (Mia Kirshner) and Alaric (Matt Davis) talk at the Grill. Alaric asks Isobel why she left him to become a vampire and she says that is what she always wanted. Isobel wants to meet Elena (Nina Dobrev) and asks Alaric to arrange a meeting for her but he refuses to do it and leaves. Isobel follows him and attacks him at the parking lot. She threatens to kill all his students if he will not do what she asked and leaves.

At Mystic High Alaric sets Matt (Zach Roerig) and Tyler (Michael Trevino) to work together and help to build the Founder's Day float before he sees Elena and Stefan (Paul Wesley) from afar and leaves. The two friends still do not talk to each other after Tyler made out with Matt's mother, Kelly, even though Tyler tries to apologize. Meanwhile, Caroline (Candice Accola) asks Bonnie (Kat Graham) what is going on between her and Elena but Bonnie does not want to say.

"Isobel" is a song by Icelandic musician Björk from her third studio album, Post (1995). Written by Sjón based on a story by Björk, the lyrics of "Isobel" tell the story of the title character, who is magically born in a forest and sends a message of instinct amongst the logic thinking of the people of the city. The story of Isobel has been explored in "Human Behaviour" and "Bachelorette", forming a trilogy. The track was released as the second single for the album as two different CD releases in August 1995. Featuring additional songwriting by Nellee Hooper and Marius de Vries, string arrangements by Eumir Deodato and production by Hooper and Björk, "Isobel" combines a lush orchestral sound with electronic breakbeats.

Most commentators were enticed by "Isobel", which they declared one of the highlights of the Post album. The single peaked at number eighteen on the Finnish Singles Charts, twenty-three on the UK Singles Charts and forty-seven on the New Zealand Singles Chart. The song was included in the compilation album Greatest Hits (2002), whose tracks were selected by fans through a survey.