Sister Frances is at a loss when she cares for diabetic and recovering cancer patient Albert Calthorpe whose fiercely independent wife Grace refuses to accept further help, despite caring for her husband, her elderly mother and her pregnant daughter. Meanwhile, Violet is given two tickets to new hit film The Sound of Music and decides to raffle them off with all proceeds going to the incubator fund, while Timothy, Angela and May want to give their parents a night off, but they're not sure how.

What connects a missing astronaut in the Indian Ocean, birds behaving strangely in Peru and a US naval officer who washes up on a Madagascan beach? Team Tardis investigate.

Paddy reveals his ultimate cheap, luxurious off-roader: the homebuilt Dirty Rascal. Chris races the £2.5m McLaren Speedtail against the RAF’s newest fighter jet. Romesh Ranganathan is the studio guest.