FAMILY REVELATIONS DNA Journey, 9pm, ITV1

ITV’S answer to Who Do You Think You Are? pairs up celebrities to explore their family histories — which, in 2019, overlapped for the very first subjects when DNA analysis proved that Ant and Dec are, in fact related. That won’t be a surprise for sisters Oti and Motsi Mabuse, who feature later in this new fourth series, as do Alex Brooker and Johnny Vegas, and Adrian

Dunbar and Neil Morrissey.

It opens with Liverpudlian comedian John Bishop and Downton Abbey star Hugh Bonneville (pictured), who formed an unlikely friendship after a chance meeting in a Covid vaccine centre — and who now find they have a lot more in common than they thought.