Casualty, BBC1, 8.40pm
NEW paramedic Ruby (Maddy Hill, who played Nancy Carter in EastEnders) is pushed to the limit on her first day with Iain and Sam. She expertly revives an overdosed drug addict, who repays her by punching her in the face. Alicia struggles to work with Eddie and her angry outbursts increase, but she opens up when Bea confronts her with concerns about her behaviour. Elsewhere, it’s the 70th anniversary of the NHS and Noel wants to celebrate with homemade stickers, while Sam apologises to Jacob for standing him up.

Reginald D Hunter’s Songs of the Border, BBC2, 9pm
THE border between the US and Mexico has been in the news a lot recently thanks to President Donald Trump and his wall, but as comedian Reginald D Hunter discovers, it’s also long held sway over the imagination of songwriters in both countries. In this documentary, Reginald takes a 2000-mile road trip along the border to learn what music can tell us about the relationship between the nations. He discovers that classic American pop and country has often portrayed Mexico as a land of escape and romance but also danger, while the music created by some of the 36 million Mexican-Americans who are also US citizens offers its own insights into topical issues such as identity, immigration and drug smuggling.

Hidden, BBC4, 9pm
THE Snowdonia-set drama continues, as Cadi visits Endaf Elwy, who has been in prison for more than a decade after being convicted for the murder of his niece. The detective believes her father convicted the wrong man and her suspicions are soon reaffirmed. Meanwhile, Megan’s best friend turns up at the station to report her missing, prompting Owen to suspect that the university student has become the kidnapper’s latest victim. But can the imprisoned girl convince Dylan’s nine-year-old daughter Nia to help her escape from her father’s cellar?