Karagar (lit. 'The prison') or Cell 145 is a thriller web series directed by Syed Ahmed Shawki that started streaming on the Bengali OTT platform Hoichoi from 19 August 2022. Hoichoi announced their upcoming new five web series, Karagar is one of them, Based on Bangladesh, the series features Chanchal Chowdhury, Intekhab Dinar, Tasnia Farin and FS Nayeem in the lead roles.

After the release of the first part of the web series, it gained popularity among the audience and became the talk of the town. The popularity of this Bangladeshi series even spread to India. Karagar helped the OTT platform Hoichoi grow their business in Bangladesh.