Release Message:  With all the strife going on around him, and an electricity-generating myrka on the loose, the Doctor (Peter Davison) endeavors to bring a little sunshine into their unhappy undersea lives.

Description:  With Silurians and Sea Devils attacking the air locks, the saboteurs use the distraction to launch plans for disabling vital functions of the base. With all the strife going on around him, and an electricity-generating myrka on the loose, the Doctor endeavors to bring a little sunshine into their unhappy undersea lives.