Cucumber is a 2015 British comedy drama television series created by Russell T Davies and aired on Channel 4. Exploring 21st-century gay life, the series focuses on middle-aged Henry Best (Vincent Franklin). Following a disastrous date night with his boyfriend of nine years, Lance Sullivan (Cyril Nri), Henry's old life shatters. He embarks on a new life with unfamiliar rules.

In development since 2006, Cucumber was announced along with E4's companion series Banana, and 4oD's web series Tofu in November 2013. The titles of all three shows come from a scientific study into the male erection, which divided the erection into a hardness scale consisting of tofu, peeled banana, banana, and cucumber. Upon reading the study, Davies remarked that "right there and then, I knew I had my drama".

Cucumber ran for one series. Davies confirmed that Cucumber was a one and done story and would not return for a second series. The show was nominated for the GLAAD Media Award for Outstanding TV Movie or Limited Series.