Warning all Synth owners – Synths have been malfunctioning and have now been recalled.

The new teaser for Channel 4′s smash hit show Humans, which stars Gemma Chan, is a product recall video from Persona Synthetics.

**Attention** https://t.co/u4Ksfh7vNl #Humans #HumansAMC pic.twitter.com/puTFL0l3EH

— Gemma Chan (@Gemma_Chan1) September 23, 2016

According to the video, the synthetic humans are failing with location recognition, physical co-ordination and facial expression and owners have been advised to send them back.

Human owners were also advised against trying to reset Synths.

The first season of the hit show was set in a parallel present where the must-have gadget for a busy family was a human-like robot.

(Channel 4)

It followed a group of humanoids facing the discovery they are conscious.

The first series attracted an average of 4.8 million viewers and became Channel 4′s highest rated drama in 20 years.

(Channel 4)

The show is expected to return to the channel later this year.