A news report on a couple looking for their missing son, Ashley, brings a surprise for Sarah Jane (Elisabeth Sladen) when she discovers that the missing boy looks exactly like Luke (Tommy Knight). And when Mr Smith (Alexander Armstrong) confirms that Luke is a genetic match with Ashley, Sarah Jane sends him back to live with his 'parents'. With no knowledge of his former life, Luke finds it hard to fit in and, when he tries to escape, he makes a startling discovery about who his parents really are. Sarah Jane, meanwhile, makes some investigations into the Pharos Para-Science Institute – a research unit that has been conducting experiments using alien technology. Floella Benjamin guest stars as Professor Rivers.

Trouble is brewing at Spellman's Magical Museum of the Circus when a group of people join hands and block the entrance the the museum... but they let Sarah Jane in, what is this mystery all about?

A haunted house, with mysterious whispers and secrets in the shadows - time for Sarah Jane Smith!

Sarah Jane and the gang discover the secret of Erasmus Darkening - but are they too late?

Sarah Jane discovers an abandoned baby girl on her doorstep and attempts to find out who left her there. At a local nuclear power station, a beautiful woman appears out of nowhere and uses alien powers to take control of the place.