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A new communications system causes problems at Cresta Cabs when Sam and Reen accidentally broadcast a private conversation to all cabs. Sam's partner Dexter returns from abroad after a breakdown caused by his unfaithful wife Tina.
Cresta Cabs is short of drivers, but Dexter has not returned to work yet. He wrongly suspects Tina of being unfaithful again and gets Cambridge to destroy an expensive painting he bought her, not realising that Cambridge is in someone else's house.
Dexter sees the insurance salesman Tina had an affair with at his house. He jumps into the Thames, and soon afterwards the insurance salesman's body is found in the boot of one of the minicabs.
Sam makes the arrangements for Dexter's funeral, but things do not go as planned. Henry drives a pregnant woman to the hospital and is mistaken for the baby's father.
Baz finally connects with one of his dates, but he learns that Andre is the father of her son. Rajiv is mugged in his minicab and is afraid to return to work. Sam asks for Rajiv's help with the company accounts and learns that Dexter embezzled large amounts of money.
Phil is promised a spot for his band in a talent show if he can acquire a boa constrictor for one of his agent's other clients. Marlon gets a job in a grocery store. Sam goes to visit his wife who is in a nursing home with early-onset Alzheimer's.
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