Dara O Briain hosts the ultimate test of collective, cross-generational intelligence. Who will overcome brain freeze and inch closer to The Family Brain Games crown?

The Riley family and the Kerr family prepare to have their intellectual talents tested like never before.

In the final heat, the Mohammed family from Watford and the Smith family from Cumbria compete for the last remaining spot in the semi-finals.

Dara O Briain hosts the ultimate test of cross-generational intelligence. In semi-finals week, the six remaining families battle it out to be crowned the winner.

In the second semi-final, two more of last week’s winning families return to the games lab and go head to head in the ultimate test of intelligence in a bid to make it through to the final.

In the last semi-final, the competition reaches fever pitch. The fastest runners-up from the heats go head to head and need to push their brains to the limit in order to reach the final.

In the grand final, the three sharpest families attempt the final super-charged challenges with ultimate levels of difficulty.