Ep 4. Arachnids in the UK

The Doctor and her companions return to modern-day Sheffield, only to find themselves in the middle of a deadly infestation of spiders that is spreading rapidly throughout the city. The team uncovers a conspiracy involving a luxury hotel owner, a corrupt politician, and a scientific experiment gone awry that has led to the spiders growing to massive sizes and attacking humans. Along the way, they meet a grieving mother and her daughter who have been affected by the spider infestation, and must work together to find a way to stop the spiders before it's too late.

As they navigate through the dangerous and spider-filled city, the Doctor and her companions confront their fears and work to find a solution to stop the spiders. They must grapple with the ethical implications of experimenting with nature and the consequences of corporate greed. In addition to the spider infestation, the team also confronts the consequences of the Doctor's absence over the centuries, as she reflects on the collateral damage of her time-traveling adventures.

Throughout the course of the episode, the Doctor also continues to develop her relationship with her new companions, Ryan, Yasmin and Graham. They begin to understand each other better and work together effectively to solve the problems they encounter. The episode includes tense action sequences as the team fights to survive the spider attacks and unravel the conspiracy, as well as emotional moments as they help the mother and daughter affected by the crisis.

Overall, "Arachnids in the UK" is a tense and dramatic episode that is sure to keep viewers on the edge of their seats. The blend of action, emotion, and social commentary is a hallmark of the Doctor Who series, and this episode delivers on all fronts. Fans of the series will appreciate the ongoing development of the Doctor's character and her relationships with her companions, as well as the impressive special effects used to bring the spider infestation to life.