Reviewing "Lunarville 7", "Crater 101" and "Dangerous Rendezvous" for Andersonic, Vincent Law writes positively of various aspects of "Crater 101". He notes that the episode's "discordant" incidental music implies "something ominous" about Frazer and praises the scene of Scarlet "[making] a grab for the crystal" for demonstrating the puppet's mobility. Law also praises the role of Lieutenant Green in both "Lunarville 7" and "Crater 101", writing that the character is given an opportunity to "get his feet stuck in on the action" and applauding the scene in which Green destroys the master sentry vehicle. Andrew Thomas of Dreamwatch magazine considers the sentry vehicles to be an example of the series' occasionally "shoddy" miniature model work, commenting that they "look disturbingly like something out of Michael Bentine's Potty Time."
