Simon Pegg returns as GCHQ director of operations Danny Patrick in the second season of Peter Kosminsky's cyber-thriller The Undeclared War, airing on Channel 4 at 9pm. The series picks up with Danny having uncovered shocking secrets about government operations and his own marriage, and the situation has only worsened. Saara (Hannah Khalique-Brown) detects irregularities in information flows, indicating a mole within the intelligence agency. The season features intense scenes of scowling and corridor chases, with Adrian Lester reprising his role as the prime minister and Siân Brooke joining as Danny's wife, a former MI6 member.
Other TV Highlights for Tonight
The Great British Sewing Bee (8pm, BBC One) continues with a colour and prints theme, hosted by Sophie Willan. Contestants face challenging briefs, with one describing their creation as 'absolutely hideous.'
Murder 24/7 (9pm, BBC One) returns with a raw look at real murder cases. This episode features Jo, found dead with a knife wound, and her husband Mohamed arrested. However, lack of fingerprints and blood pattern inconsistencies raise doubts.
Faithless (9pm, Sky Atlantic) concludes with a double bill spanning decades. In the late 1970s, actress Marianne (Frida Gustavsson) has an affair with director David (Gustav Lindh), which reignites at her theatre. Their reckless behaviour peaks at a birthday party, leading to tragedy in 1980.
Johnny Vegas' Little Shop of Antiques (9pm, Quest) returns for season two, following Vegas, his best mate Bev, and girlfriend Vikki as they fit out a new antiques shop, acquire an electric van, and aim to go online. A trip to Anglesey involves haggling with veteran dealer Trish.
Film Choice and Live Sport
The Pillow Book (1.10am, Film4) is Peter Greenaway's 1996 film about model Nagiko (Vivian Wu), who derives sexual pleasure from calligraphers writing on her body. She begins a torrid affair with British translator Jerome (Ewan McGregor) and seeks literary revenge against a publisher.
Live sport includes The Hundred women's cricket: MI London v Sunrisers Leeds at 2.30pm on BBC Two, and men's cricket: MI London v Sunrisers Leeds at 6pm on BBC Two. Southern Brave v Welsh Fire airs Wednesday.
Note: This article was amended on 21 July 2026 to remove a preview of Prison Wives of TikTok on U&W, as transmission was postponed.
