Neither Matthew nor Luke contains the attempt by Jesus' family to bring Jesus home as having lost his senses, though they do both retain their standing outside and Jesus identification of his followers as his true family
14 He appointed twelve, that they might be with him, and that he might send them out to preach
15 ..19 <further duties and their names>
Then he came into a house.
20 The multitude came together again, so that they could not so much as eat bread.
21 When they heard it, those close to him went out to take hold of him; for (gar) they said, “He is [see discussion].”
22 The scribes who came down from Jerusalem said, “He has Beelzebul,” and, “By the prince of the demons he casts out the demons.”
"The attempt by Jesus' family to bring Jesus home as having lost his senses," is primarily a matter of interpretation, not clear assertion by Mark. That "those close to Jesus" (TC2J) are his family is a reasonable inference (they show up outside the house shortly thereafter), and it's the interpretation I personally favor, but it is not obligatory. (And therefore not necessarily Matthew's or Luke's interpretation.)
TC2J could be the just-before-appointed apostles, or the just-after-identified villains from Jerusalem. The latter possibility might even be clouded by a versification artifact:
When they heard it, those close to him went out to take hold of him.
Indeed (gar) they said, "He is [see discussion]," the scribes who came down from Jerusalem. They said, "He has Beelzebul, etc.
Regardless of the identity of TC2J, the mental state verb ( crazy?) is the same as for Mark's crowds witnessing Jesus's feats and hearing his teachings (astounded?). Nowhere does Mark use it as a pejorative. Paul does contrast it with sobriety, but whatever it is, in Mark or in Paul, it appears to be a transient mental state, not a chronic condition. I favor overwhelmed.
The form and purpose of the hold-taking depends on the condition to be remedied.
There is nothing in Mark about where, if anywhere, Jesus would have been taken once he and his rescuers-or-captors were outside. Although Jesus's family shows up outside the house, still presumably too crowded for them to enter easily, there is nothing in Mark about their doing anything except asking that Jesus be made aware of their presence. If it's their "taking hold plan" (as I believe it is), then it involves and requires Jesus's cooperation.
More detail on the discussion summarized above can be found here:
https://uncertaintist.wordpress.com/202 ... was-crazy/
and for a still different perspective, at James McGrath's blog here:
https://www.patheos.com/blogs/religionp ... h-him.html