TV picks tonight: Joanna Lumley Meets Will.i.am and new Norwegian drama Mammon

What to watch on TV this evening, Friday 28 March

Joanna Lumley and will.i.am at the I.Am.Angel Foundation headquarters in Los Angeles (BBC )

Joanna Lumley Meets will.i.am

10.35pm, BBC1

At home in the Hollywood Hills with the musician and the Voice UK judge. Not entirely sure why a patently star-struck Joanna Lumley (above left, with will.i.am) has this gig, although she claims to have been obsessed with him since seeing him carrying the Olympic torch in 2012.

Mammon

9pm, More4

Scandi-noir, and it’s not on Saturday-night BBC4. More4’s promising new Norwegian import begins in 2008, when journalist Peter Veras (Jon Oigarden) uncovers a financial scandal that leads to his own brother, and continues in 2013, when Veras and his sister-in-law receive a mysterious suitcase containing diving gear.

Gardeners' World

9pm, BBC2

Carol Klein celebrates the daffodil (aren’t daffs over by now?), Monty Don pots up dahlia tubers and Joe Swift meets a Lancashire woman who has spent two decades creating a garden on a cliff face. Excellent for climbing plants, no doubt.

The Genius of Bert Jansch: Folk, Blues & Beyond

9pm & 2.30am, BBC4

A celebration of the Scottish guitarist, songwriter and founding member of the band Pentangle, who died in 2011. Robert Plant, Johnny Marr and Ralph McTell are among several illustrious names claiming inspiration from Jansch.

A Very British Renaissance

9.30pm, BBC2

James Fox explores the development of artistic ideas in Elizabethan England – an age obsessed with secrets and codes.