Don't miss: Brooklyn Nine-Nine at 4:00pm on E4

Peralta enlists Jeffords to help him tackle a cold case that everyone thinks is unsolvable. Meanwhile, Santiago plans a romantic weekend away with her new boyfriend Teddy, and Gina and Diaz tell Boyle one of their best-kept secrets. Comedy, starring Andy Samberg and Melissa Fumero"> Welcome to your daily update on the best shows to watch on TV. Email not displaying correctly? [View it in your browser]( [TV Daily - Your guide to everything new on TV - by TVGuide.co.uk] [TV Daily - Your guide to everything new on TV - by TVGuide.co.uk]( [MUST-SEE TV]( 19 August [Brooklyn Nine-Nine]( [Brooklyn Nine-Nine]( [E4] 4:00pm, E4 Season 1 Episode 21 of 22 Unsolvable [Peralta enlists Jeffords to help him tackle a cold case that everyone thinks is unsolvable. Meanwhile, Santiago plans a romantic weekend away with her new boyfriend Teddy, and Gina and Diaz tell Boyle one of their best-kept secrets. Comedy, starring Andy Samberg and Melissa Fumero]( [More]( [World's Greatest Motorcycle Rides]( [World's Greatest Motorcycle Rides]( [Travel Channel ] 5:00pm, Travel Channel Season 7 Episode 2 of 2 New Zealand Part 2 Henry Cole continues to ride his Harley Davidson through the South Island. His route takes him through primeval forests and lovely west coast towns like Greymouth [More]( [The Big Bang Theory]( [The Big Bang Theory]( [E4] 6:00pm, E4 Season 6 Episode 10 of 24 The Fish Guts Displacement As part of the relationship agreement, Sheldon reluctantly has to take care of Amy when she gets sick, but she loves the extra attention so much she pretends to remain in poor health. Els... [More]( [Taskmaster]( [Taskmaster]( [Dave] 7:00pm, Dave Season 7 Episode 1 of 10 The Mean Bean Five new contestants, James Acaster, Jessica Knappett, Kerry Godliman, Phil Wang and Rhod Gilbert, complete a series of tasks [More]( [Temptation Island]( [Temptation Island]( [E! Entertainment HD] 8:00pm, E! 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Danny and Baez unravel a murder victim's complicated love life [More]( [Stath Lets Flats]( [Stath Lets Flats]( [Channel 4 HD] 10:00pm, Channel 4 HD Season 2 Episode 1 of 6 A Dreadfully New Time New boss Julian is making changes at Michael & Eagle and when he unveils a slick new promo with no mention of the family, Stath decides to make his own rival video. Meanwhile, Sophie trie... [More]( [Call the Cops]( [Call the Cops]( [Channel 4 +1] 10:00pm, Channel 4 +1 Season 1 Episode 1 of 8 Documentary going behind the scenes with the Devon and Cornwall police force, showing the critical decisions that the communications and control centre team makes each day. The first edit... [More]( [Mafia Killers]( [Mafia Killers]( [History HD] 10:00pm, History HD Season 1 Episode 1 of 6 John Gotti - The Teflon Don Former detective Colin McLaren examines notorious mobsters who played the deadly game and won, at least temporarily. He begins by looking at the career of John Gotti, boss of the Gambino ... 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