From the coastguard to the crazies, there's plenty to keep you entertained tonight! Ireland’s Search and Rescue – RTÉ One (8.30pm) In the last of the series, Bláthnaid Ní Chofaigh is out with the Irish Air Corps while the coastguard must help a woman who has become trapped in a cave. Sherlock – RTÉ Two (9.00pm) The quirky detective and his sidekick Dr John Watson are investigating a series of suicides in this episode of the crime drama starring Benedict Cumberbatch and Martin Freeman. The Armstrong Lie – Channel 4 (9.00pm) Documentary exploring the scandal surrounding cycling champion Lance Armstrong, who was found to have been using performance-enhancing drugs during his career. Michaella, Peru and the Drugs Run – RTÉ One (9.35pm) This programme takes a closer look at Michaella McCollum Connolly who was sentenced to six years in prison after being caught smuggling cocaine. The Crazies – E4 (10.00pm) A toxic chemical turns a number of townsfolk into murderous maniacs. Horror remake with Timothy Olyphant and Radha Mitchell.