I have recently watched the creepy and atmospheric gothic Doctor Who episode Horror of Fang Rock. It starts after the TARDIS lands on the island of Fang Rock off the south coast of England in the early years of the 20th century. So the Fourth Doctor (Tom Baker) and Leela (Louise Jameson) decides to investigate a creepy Lighthouse. Upon arrival the Doctor discovers the dead body of one of the keepers, Ben. The other two keepers, old superstitious Reuben and the keen young Vince Hawkins, mention a strange light which recently fell from the sky near the island and that the Electricity Generator powering the Light keeps failing for no apparent reason. Reuben thinks the mythical Beast of Fang Rock, which reputedly once terrorised the lighthouse is responsible. The Doctor thenDiscovers a curious electrical anomaly which has killed many fish nearby.
Then after another mysterious power failure A luxury yacht runs aground on Fang Rock. The four survivors are brought to the lighthouse: the bosun Harker; Colonel James Skinsale MP; the owner, Lord Palmerdale; and his highly strung secretary Adelaide Lessage. It eventually transpires that some of the crew of the yacht are up to no good and are smuggling diamonds. Later Harker and the Doctor retrieve Ben’s corpse and the Doctor suspects an alien May be at large on Fang Rock. Reuben then mysteriously disappears and then reappears later on a changed man. Then Palmerdale and Harker are found dead and the Doctor suspects that Reuben may have been possessed by an aggresive alien life form. Reuben’s body is then found and the rest of the crew face a fight for survival as they are picked off one-by-one.
The alien reveals itself to be a Rutan, an intelligent amphibious alien whose scout ship crash landed in the sea and that it is trying to summon its mother ship. It also reveals a rather sinister plan to turn Earth into a base From which The Rutans can launch a counter attack against their sworn enemies The Sontarans. So the Doctor and Skinsale think of a plan to defeat the Rutans, Sadly though, Skinsale is killed by the Rutan while he and the Doctor are working on something to defeat the Rutan Mother Ship.