HIGHLIGHT: Sunday Worship The Archbishop of Canterbury leads a service for the second Sunday of Advent from Lambeth Palace, taking the theme from the Christmas campaign Follow the Star. Sunday 8.10am Radio 4

TELEVISION: Friday 7.30pm (C4) Unreported World Krishnan Guru-Murthy visits Timbuktu, where the threat of Islamist extremism is growing.

9pm (BBC2) The Name of the Rose Inquisitor Gui tortures Salvatore, who makes a confession (7/8).

Sunday 10.30am (BBC1) Fern Britton Meets. . . The actor and presenter Alexander Armstrong discusses his religious beliefs (2/4).

1.15pm (BBC1) Songs of Praise J. B. Gill meets Jonathan Bryan, aged 13, who has cerebral palsy. Gill finds out why Christmas is so important to Jonathan.

8pm (BBC1) His Dark Materials Lyra discovers the truth behind the Gobblers’ activities in the North (6/8).

8pm (Nat Geographic) Buried Secrets of the Bible The story behind the destruction of Sodom and Gomorrah.

RADIO: Friday 1.30pm (World Service) Heart and Soul Nina Robinson journeys with Sikh pilgrims to visit the monument to Guru Nanak, the founder of Sikhism.

Saturday 10.30am (R4) James Veitch’s Contractual Obligation The comedian asks whether mindfulness is just “fast-food spirituality” (1/3).

Sunday 3pm (R3) Choral Evensong An archive recording from Lichfield Cathedral, first broadcast on 3 December 2008.

Monday 4.30pm (R4) Beyond Belief Ernie Rea and guests discuss friendship (2/6).

Wednesday 3.30pm (R3) Choral Evensong A service recorded on 23 April at Rugby School.